OTR-Performance Webshop - Enduro, Travel- and Rally-Equipment for Yamaha and other motorbikes.
OTR Piston XT-660 R/X/Z 104 mm
Racing Forging Piston, lighter than the original and of much higher value! The piston is milled from the whole with premium procession. We use a bore with a size up to 5 mm wider than the original. The compression ratio is lifted to 11:1 (stock 10:1). Instead of 659 ccm now up to 727 ccm are available for the combustion of the mixture. The results are convincing: In the lower and middle speed range the compression is greater and the single cylinder engine grips nearly up to the nominal rotation speed. Up to 7hp more are now avaiable!
- Piston with 100, 102, 104 mm avaiable
- 105 mm on request
- 660, 686, 714 or 727 ccm
- More power over the whole range
- Cylinder boring and coating necessary (100mm only honing)
- machine milled piston
- fitting head gasket sold separately
- Sold with pistonrings, clips and bolt
Gasket, Cylinder Head, XT-660 R/X
from 44,90 € Weight: 0.1 kg more Info
Gasket, Cylinder, Bottom,...
18,90 € * Weight: 0.1 kg To cart
cam chain tensioner gasket,...
3,90 € * Weight: 0.1 kg To cart
OTR racing camshaft XT-660
from 219,00 € Weight: 0.7 kg more Info
Cylinder head modification XT-660
from 349,00 € Weight: 4.5 kg more Info
Big bore cylinder XT-660
from 289,00 € Weight: 4.5 kg more Info