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This performance big bore kit will increase your Yamaha's power output up to 30hp with the right supporting mods! This kit is considered stage 3 and should only be used if you have upgraded your cylinder head, throttle body, exhaust and fueling!

The 65mm UMA racing big bore cylinder kits are plug and play ready for your machine, built to standards exceeding the manufacturers for worry free use. Ceramic block material will withstand extremely high temperatures. Available with forged flat or high compression domed pistons (for use together with the UMA Superhead). This plug and play bore up kit will increase your motor's displacement to 195cc(200cc) with the stock crank stroke. This kit is made for the Yamaha YZF-R15 150cc motorcycles. Also fits models like the R125, WR125, MT-125 that use the same engine. 

If you are planning to upgrade your cylinder bore size, why not try on a matching cylinder head and throttle body upgrade? UMA also produces a matching 23/20 and 22/25 performance cylinder head kit with the internals included to go with the 62/65mm bore up kit upgrades.

 

Fitting:

Yamaha Jupiter MX/Crypton X/Spark/Exciter/sniper/T135

Yamaha Jupiter MX King/Crypton X/Spark/Exciter/Sniper T150

Yamaha Fz150i Vixion

Yamaha R15/YZF-R125/MT-15/MT-125/WR125

           
 



TERMS/RETURNS
1. Most of our parts do not have manufacturer warranties as they are for racing use, please consult your mechanic first before buying!
2. Import duties, delays, taxes and charges are not included in the item price or shipping fee. Import duties are the buyer’s responsibility. 
3. Please check with your country’s customs to determine any additional costs before buying. 
4. Return shipping costs are paid by the buyer for any exchanges.
5. Please be sure that your shipping address registered in Paypal/ebay is correct. 
6. Returns accepted when goods are damaged when shipping.
7. Returns accepted when goods are not the same as the description.
 


SHIPPING/TAX

1. We can ship to most countries internationally.
2. We will ship within 10 business days of receiving payment (depending on ready stock).
3. All items are shipped from Malaysia.
4. Items usually take 10-30 business days for delivery, except some countries where it might take up to 80-90 days.
 
EMS (Fastest Method Shipping) = 3 - 10 Days (Estimated) - extra charges may apply
Standard Shipping (Air Mail) = 10 - 40 Days (Estimated)
 
5. Our packages are normally marked as "bike parts" for customs clearance Import taxes. 
6. There is no shipping insurance on shipments by default, if you would like to add on insurance for your shipment for a small fee, please let us know after making a purchase.