{"title":"Yamaha \/ Sherco \/ Beta","description":null,"products":[{"product_id":"tsp-billet-head-yamaha-yz250-and-yz250x-1999-on","title":"TSP Billet Head ' Yamaha YZ250 and YZ250X 1999-on","description":"Must do mod for the YZ 250, much better rideability and power everywhere over stock. Watch the video below for all the upgrades that make these bikes go really well.\r\n\r\nSelect your desired compression ratio from the drop down menu. All designs will work with stock base gaskets and cylinder heights and offer significant improvements over stock heads.\r\n\r\n\u003cstrong\u003eLOW COMPRESSION:'\u003c\/strong\u003eThis Low comp design is the same comp ratio as the stock 250X model head but with a much better design. It gives much better bottom\/mid and much better part throttle response. It is the design we normally suggest for the X model at sea level.\r\n\r\n\u003cstrong\u003eMEDIUM COMPRESSION:'\u003c\/strong\u003eThis Med design is the same as we have been selling for the standard MX model for years. It is actually lower compression than stock but gives much better throttle response and smoother, crisper power delivery. It is suited the the standard YZ250 model at sea level and for high level MX where the engine is revved hard.\r\n\r\n\u003cstrong\u003eHIGH COMPRESSION:'\u003c\/strong\u003eThis new design is roughly the same compression ratio as the stock YZ250 head but with a much better design. It gives much more bottom\/mid power than stock, plus higher peak power. It doesn't rev out as far as the Medium design. It is best suited to trail-riding, off-road racing and MX where the rider wants max bottom\/mid.\r\n\r\nOur new TSP Billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike! Our design offers better heat dissipation than many other 2 piece designs due to the large lower section which incorporates the combustion chamber' this allows heat from combustion to disperse over a larger area than other 2 piece designs for improved heat transfer to the coolant.\r\n\r\nThese Billet machined 2 piece heads feature TSP's proven combustion chamber designs and are a MUST HAVE mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested' the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much SMOOTHER power delivery.\r\n\r\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP.\r\n\r\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets. If you are unsure of your current base gasket thickness we can advise the correct thickness to achieve the necessary cylinder height and squish clearance.\r\n\r\nWe can also advise baseline jetting specs to go with your new Billet head. The customer takes all responsibility for ensuring that jetting is appropriate for their riding style and conditions.\r\n\r\n \r\n\r\n[embed]https:\/\/www.youtube.com\/watch'v=GXiEZe3JXaw[\/embed]","brand":"Rutherford Racing","offers":[{"title":"High Compression","offer_id":42374368919627,"sku":"P.H.YA250.99on.15.5H","price":235.0,"currency_code":"GBP","in_stock":true},{"title":"Medium Compression","offer_id":42374368952395,"sku":"P.H.YA250.99on.14.8M","price":235.0,"currency_code":"GBP","in_stock":true},{"title":"Low Compression","offer_id":42374368985163,"sku":"P.H.YA250.99on.14.1L","price":235.0,"currency_code":"GBP","in_stock":true},{"title":"Low and Medium Package Deal","offer_id":42374369017931,"sku":"10197","price":235.0,"currency_code":"GBP","in_stock":true},{"title":"Medium and High Package Deal","offer_id":42374369050699,"sku":"10196","price":235.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/YZ250-HEAD.jpg?v=1785517190"},{"product_id":"tsp-billet-head-yamaha-yz125-2005-2021-yz125x-2020-2022","title":"TSP Billet Head ' Yamaha YZ125 2005-2021 \u0026 YZ125X 2005-on","description":"Must do mod for the YZ125 makes a great little motor pull better from the bottom all the way through making it easier to ride for all abilities.\r\n\r\nThis head suits the models listed below:\r\n\r\nYZ125 2005-2021 ' See the listing for our 2022 model.\r\n\r\nYZ125X 2020-2022\r\n\r\nChoose your desired compression ratio from the drop down list.\r\n\r\n\u003cstrong\u003eMedium Compression: \u003c\/strong\u003eThis design offers a similar compression ratio to the stock head, but with a much better design. Squish clearance is tighter than stock and the design is much more detonation resistant than the stock head. It offers improved power throughout the rev range and makes a great bike even better. It is best suited to high level MX riding or very fast riders who like to rev the engine hard.\r\n\r\n\u003cstrong\u003eHigh Compression: \u003c\/strong\u003eThis design is slightly higher compression than the stock head but still safe for 98 RON pump fuel with appropriate jetting. It offers improved bottom\/mid power over the Mid\/High design and is best suited to trail riding, offroad racing or MX riders who want max midrange pull. It is also recommended for the YZ125X model and gives very linear, strong power delivery when the standard YZ125 model powervalve spring is used (we can supply this if necessary).\r\n\r\nOur new TSP Billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike! Our design offers better heat dissipation than many other 2 piece designs due to the large lower section which incorporates the combustion chamber' this allows heat from combustion to disperse over a larger area than other 2 piece designs for improved heat transfer to the coolant.\r\n\r\nThese Billet machined 2 piece heads feature TSP's proven combustion chamber designs and are a MUST HAVE mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested' the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much SMOOTHER power delivery.\r\n\r\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP.\r\n\r\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets. If you are unsure of your current base gasket thickness we can advise the correct thickness to achieve the necessary cylinder height and squish clearance.\r\n\r\nWe can also advise baseline jetting specs to go with your new Billet head. The customer takes all responsibility for ensuring that jetting is appropriate for their riding style and conditions.\r\n\r\n\u003chr\u003e\r\n\r\nBelow is a video with this head with our TSP ignition and scalvini pipe for the YZ125:\r\n\r\n \r\n\r\n[embed]https:\/\/www.youtube.com\/watch'v=Hq7BONrG1LE[\/embed]","brand":"Rutherford Racing","offers":[{"title":"High Compression","offer_id":42374369083467,"sku":"P.H.YA125.0521.15.6H","price":220.0,"currency_code":"GBP","in_stock":true},{"title":"Medium Compression","offer_id":42374369116235,"sku":"P.H.YA125.0521.14.8M","price":220.0,"currency_code":"GBP","in_stock":true},{"title":"Medium and High Package Deal","offer_id":42374369149003,"sku":"10204","price":295.83,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/YZ125-HEAD.jpg?v=1785514874"},{"product_id":"tsp-billet-head-sherco-300-2018-onwards","title":"TSP Billet Head - Sherco 300 2017 onwards","description":"\u003cp style=\"text-align: left\"\u003e\u003cspan style=\"color: #ff0000\"\u003e\u003cstrong\u003ePlease see which models this head suits:\u003c\/strong\u003e\u003c\/span\u003e\u003c\/p\u003e\r\nSherco 300 2017-on Factory Models\r\n\r\nSherco 300 2019-on Factory Racing Models\r\n\r\n\u003cstrong\u003eThis head will come with a required 0.50mm or 1.00mm base gasket to ensure the correct squish clearance is achieved.\u003c\/strong\u003e\r\n\r\n\u003chr\u003e\r\n\r\nSelect your desired compression ratio from the drop down menu. All designs will work with stock base gaskets and cylinder heights and offer significant improvements over stock heads.\r\n\r\n\u003cstrong\u003eLOW COMPRESSION\u003c\/strong\u003e ' This head was designed to suit extreme enduro riding or for riders who are more interested in smoothness over power gain. It offers strong bottom end torque with a very smooth delivery that wont break traction too easily. It enables the rider to use lower revs and less clutch when tackling hard obstacles. The low comp design also offers maximum resistance to overheating in tough situations.\r\n\r\n\u003cstrong\u003eMEDIUM COMPRESSION\u003c\/strong\u003e ' This head' suits the majority of trail riders and racers who want better bottom and mid power and a small gain up top as well. The power delivery is much stronger and more tractable than stock and suits a wide range of riding conditions. Suited to 95 or 98 RON fuel (approx 89 or 91 in the USA).\r\n\r\n\u003cstrong\u003eHIGH COMPRESSION\u003c\/strong\u003e ' This head suits riders who want harder hitting power everywhere, especially down low. It completely transforms the bike into a weapon. It will also suit normal trail riders who want the' same characteristics as a medium compression head, but to suit higher elevations around 1000M or higher. Best with 98 RON fuel at sea level (approx 91 in the USA). Not suitable for extreme enduro due to the increased tendency to overheat in very tight, technical riding near sea level.\r\n\r\nOur new TSP billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike!\r\n\r\nThese Billet machined' heads feature TSP's proven combustion chamber designs and are a 'must have' mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested' the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much SMOOTHER power delivery.\r\n\r\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP.\r\n\r\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets.\r\n\r\n \r\n\r\nhttps:\/\/youtu.be\/a944d-Hg3y4\r\n\r\n ","brand":"Rutherford Racing","offers":[{"title":"Medium Compression","offer_id":42374371573835,"sku":"P.H.SH300.17on.12.7M","price":235.0,"currency_code":"GBP","in_stock":true},{"title":"Low Compression","offer_id":42374371606603,"sku":"P.H.SH300.17on.12.0L","price":235.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/KTM-BETA-SHERCO-300_81257bca-a539-4b5b-bb7c-c10245c975d2.jpg?v=1785515772"},{"product_id":"tsp-billet-head-yamaha-yz125-2022","title":"TSP Billet Head - Yamaha YZ125 2022 -on","description":"Please note - For YZ125X 2022 models, see the 06-2021 listing instead. This is to suit YZ125 2022 models with the new generation engine only.\n\n\n\nThis Billet machined head feature TSP's proven combustion chamber design and are a must have mod for most current model off-road bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested' the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much smother power delivery.\n\n\n\nThis design is slightly higher compression than the stock head but still safe for 98 RON pump fuel with appropriate jetting. It offers improved bottom\/mid power over the stock design and is best suited to trail riding, offroad racing or MX riders who want max midrange pull.\n\n\n\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP. \u003cstrong\u003eThis will have the best performance when paired with our TSP ignition unlocking the true bolt-on power potential.\u003c\/strong\u003e\n\n\n\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets. If you are unsure of your current base gasket thickness we can advise the correct thickness to achieve the necessary cylinder height and squish clearance.\n\n\n\nOur TSP Billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike! Our design offers better heat dissipation than many other 2 piece designs due to the large lower section which incorporates the combustion chamber... this allows heat from combustion to disperse over a larger area than other 2 piece designs for improved heat transfer to the coolant.\n\n\n\nWe will also advise baseline jetting specs to go with your new Billet head. The customer takes all responsibility for ensuring that jetting is appropriate for their riding style and conditions.","brand":"Rutherford Racing","offers":[{"title":"Default Title","offer_id":42374371639371,"sku":"P.H.YA125.22on.15.0H","price":237.5,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/YZ125-HEAD_acef651b-0d5d-4f95-b646-04fc2e6a82af.jpg?v=1777684437"},{"product_id":"beta-300cc-18-21-models-low-comp-cylinder-head","title":"Beta 300cc 18-21 models Low comp Cylinder head","description":"\u003cstrong\u003eLOW COMPRESSION\u003c\/strong\u003e – This head was designed to suit extreme enduro riding or for riders who are more interested in smoothness over power gain. It offers strong bottom end torque with a very smooth delivery that wont break traction too easily. It enables the rider to use lower revs and less clutch when tackling hard obstacles. The low comp design also offers maximum resistance to overheating in tough situations.\r\n\r\nOur new TSP billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike!\r\n\r\nThese Billet machined  heads feature TSP’s proven combustion chamber designs and are a ‘must have’ mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested… the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much SMOOTHER power delivery.\r\n\r\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP.\r\n\r\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets.\r\n\u003cdiv class=\"fluid-width-video-wrapper\"\u003e\u003c\/div\u003e\r\n \r\n\r\n ","brand":"Rutherford Racing","offers":[{"title":"Default Title","offer_id":42376952545355,"sku":"P.H.BE3-00.1821.12.0L","price":241.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/KTM-BETA-SHERCO-300-960x960-1_be7ceae3-810c-4a0a-bfeb-5ca00596d2d1.jpg?v=1785478039"},{"product_id":"beta-300-rr-x-pro-2022-on-models-tsp-billet-head","title":"Beta 300 RR\/X-PRO 2022-on Models – TSP Billet Head","description":" \r\n\r\n \r\n\r\n\u003cb\u003eThis head is to suit the following models:\u003c\/b\u003e\r\n\u003cul\u003e\r\n \t\u003cli\u003e\u003cb\u003eBeta 300 RR 2022-on \u003c\/b\u003e\u003c\/li\u003e\r\n \t\u003cli\u003e\u003cb\u003eBeta 300 RR Race 2022-on\u003c\/b\u003e\u003c\/li\u003e\r\n \t\u003cli\u003e\u003cb\u003eBeta 300 X-PRO 25-on \u003c\/b\u003e\u003c\/li\u003e\r\n\u003c\/ul\u003e\r\nThis will suit 2022 on models with both the single, or dual spark plug head design. Models with the dual spark head design will need to disconnect one of their coils, and convert to the single standard Beta 300RR 14mm spark plug (or our BR8EG) to run our head design.\r\n\r\n\u003cstrong\u003eAll Beta heads come complete with new head O-Rings and washers included.\u003c\/strong\u003e\r\n\r\n\u003chr\u003e\r\n\r\nSelect your desired compression ratio from the drop down menu. All designs will work with stock base gaskets and cylinder heights and offer significant improvements over stock heads.\r\n\r\n\u003cstrong\u003eLOW COMPRESSION\u003c\/strong\u003e – This head was designed to suit extreme enduro riding or for riders who are more interested in smoothness over power gain. It offers strong bottom end torque with a very smooth delivery that wont break traction too easily. It enables the rider to use lower revs and less clutch when tackling hard obstacles. The low comp design also offers maximum resistance to overheating in tough situations.\r\n\r\n\u003cstrong\u003eMEDIUM COMPRESSION\u003c\/strong\u003e – This head  suits the majority of trail riders and racers who want better bottom and mid power and a small gain up top as well. The power delivery is much stronger and more tractable than stock and suits a wide range of riding conditions. Suited to 95 or 98 RON fuel (approx 89 or 91 in the USA).\r\n\r\n\u003cstrong\u003eHIGH COMPRESSION\u003c\/strong\u003e – This head suits riders who want harder hitting power everywhere, especially down low. It completely transforms the bike into a weapon. It will also suit normal trail riders who want the  same characteristics as a medium compression head, but to suit higher elevations around 1000M or higher. Best with 98 RON fuel at sea level (approx 91 in the USA). Not suitable for extreme enduro due to the increased tendency to overheat in very tight, technical riding near sea level.\r\n\r\nOur new TSP billet cylinder heads are machined from solid 6061 T6 stock and offer improved performance, reliability and fuel economy. They are the best bolt on mod you can buy for your bike!\r\n\r\nThese Billet machined  heads feature TSP’s proven combustion chamber designs and are a ‘must have’ mod for most current model offroad bikes. Our combustion chamber designs have been used by hundreds of happy customers and have been extensively dyno tested… the gains are consistent and include: increased power throughout the rev range (especially bottom\/mid), improved fuel economy, greatly reduced risk of detonation, increased top end life in many models, and much SMOOTHER power delivery.\r\n\r\nThe unique Billet design has been 100% developed, machined and tested in-house at TSP.\r\n\r\nThese Billet heads will bolt onto your standard cylinder and are designed to work with standard base gaskets.","brand":"Rutherford Racing","offers":[{"title":"High Compression","offer_id":42377299624011,"sku":"P.H.BE300.22on.HIGH","price":241.67,"currency_code":"GBP","in_stock":true},{"title":"Low Compression","offer_id":42377299656779,"sku":"P.H.BE300.22on.LOW","price":241.67,"currency_code":"GBP","in_stock":true},{"title":"Medium Compression","offer_id":42377299689547,"sku":"P.H.BE300.22on.Medium","price":241.67,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/P.H.BE300.22on.BUNDLE-2_75228061-4249-4a66-a8ea-66f66ed254db.jpg?v=1785495418"},{"product_id":"tsp-head-insert-suits-tsp-billet-head-for-beta-300-22-on-models","title":"TSP Head insert – suits TSP Billet Head for Beta 300 22-on Models","description":" \r\n\r\n \r\n\r\n \r\n\r\nThis listing is for the insert only, it does not include the head!\r\n\r\nThis is the listing to buy additional compression inserts to suit your TSP Beta 300 head from 2022-on with the removable compression insert design. The new head was designed for the intention to easily change the head inserts to suit different riding situations, while offering them at a cost effective price. This insert \u003cstrong\u003ewill not\u003c\/strong\u003e work in the standard OEM head cap.\r\n\r\nThis insert will come with a cylinder head o-ring kit\r\n\r\n\u003cstrong\u003eLOW COMPRESSION\u003c\/strong\u003e – This head was designed to suit extreme enduro riding or for riders who are more interested in smoothness over power gain. It offers strong bottom end torque with a very smooth delivery that wont break traction too easily. It enables the rider to use lower revs and less clutch when tackling hard obstacles. The low comp design also offers maximum resistance to overheating in tough situations.\r\n\r\n\u003cstrong\u003eMEDIUM COMPRESSION\u003c\/strong\u003e – This head  suits the majority of trail riders and racers who want better bottom and mid power and a small gain up top as well. The power delivery is much stronger and more tractable than stock and suits a wide range of riding conditions. Suited to 95 or 98 RON fuel (approx 89 or 91 in the USA).\r\n\r\n\u003cstrong\u003eHIGH COMPRESSION\u003c\/strong\u003e – This head suits riders who want harder hitting power everywhere, especially down low. It completely transforms the bike into a weapon. It will also suit normal trail riders who want the  same characteristics as a medium compression head, but to suit higher elevations around 1000M or higher. Best with 98 RON fuel at sea level (approx 91 in the USA). Not suitable for extreme enduro due to the increased tendency to overheat in very tight, technical riding near sea level.","brand":"Rutherford Racing","offers":[{"title":"High Compression","offer_id":42377299755083,"sku":"P.I.BE300.22on.High","price":68.0,"currency_code":"GBP","in_stock":true},{"title":"Low Compression","offer_id":42377299787851,"sku":"P.I.BE300.22on.Low","price":68.0,"currency_code":"GBP","in_stock":true},{"title":"Medium Compression","offer_id":42377299820619,"sku":"P.I.BE300.22on.Medium","price":68.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/P.I.BE300.22on.jpg?v=1785436466"},{"product_id":"tsp-medium-comp-head-insert-insert-suits-tsp-billet-head-for-beta-300-2018-2021-models","title":"TSP Medium Comp Head insert – suits TSP Billet Head for Beta 300 2018-2021 Models","description":"This listing is for the insert only, it does not include the head!\r\n\r\nThis is the listing to buy additional compression inserts to suit your TSP Beta 300 head from 2018-2021 with the removable compression insert design. The new head was designed for the intention to easily change the head inserts to suit different riding situations, while offering them at a cost effective price.\r\n\r\nThis insert will come with the inner o-ring required.\r\n\r\n\u003cstrong\u003eLOW COMPRESSION\u003c\/strong\u003e – This head was designed to suit extreme enduro riding or for riders who are more interested in smoothness over power gain. It offers strong bottom end torque with a very smooth delivery that wont break traction too easily. It enables the rider to use lower revs and less clutch when tackling hard obstacles. The low comp design also offers maximum resistance to overheating in tough situations.\r\n\r\n\u003cstrong\u003eMEDIUM COMPRESSION\u003c\/strong\u003e – This head  suits the majority of trail riders and racers who want better bottom and mid power and a small gain up top as well. The power delivery is much stronger and more tractable than stock and suits a wide range of riding conditions. Suited to 95 or 98 RON fuel (approx 89 or 91 in the USA).\r\n\r\n\u003cstrong\u003eHIGH COMPRESSION\u003c\/strong\u003e – This head suits riders who want harder hitting power everywhere, especially down low. It completely transforms the bike into a weapon. It will also suit normal trail riders who want the  same characteristics as a medium compression head, but to suit higher elevations around 1000M or higher. Best with 98 RON fuel at sea level (approx 91 in the USA). Not suitable for extreme enduro due to the increased tendency to overheat in very tight, technical riding near sea level.","brand":"Rutherford Racing","offers":[{"title":"Default Title","offer_id":42958622687307,"sku":"P.I.BE300.1821.12.7M","price":68.0,"currency_code":"GBP","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0666\/5171\/7707\/files\/IMG_9714_edb77b6e-795a-4c91-a4ac-865ef645fe36.jpg?v=1785487149"}],"url":"https:\/\/rutherfordracing.co.uk\/collections\/product_cat-yamaha-sherco-beta.oembed","provider":"Rutherford Racing","version":"1.0","type":"link"}