Description

Once your order is placed, your kit will be assembled, this can take up to three weeks as we fully recondition the barrels to like new. Once you have fitted the kit we require your old barrels as a core exchange. Please use the delivery packaging to return your old barrels and please make sure they are cleaned of oil before posting them back to us.

There are very few modifications you can perform on an engine that will improve power and torque right through the rev range, but TTP’s 904s big bore kit is one of those modifications. Increasing cubic capacity and compression ratio give improved performance from idle to the rev limit, with no downside.

In use the extra top end horsepower is excellent for acceleration and top speed, but the revelation is the extra torque through out the rev range. It makes riding a Triumph twin far more exiting as when you open the throttle, the engine just pulls and pulls to the red line.

Designed by TTP, the 904s kit includes excellent quality high compression race pistons with exceptional quench properties for powerful combustion, a custom 904 MLS steel head gasket together with OEM cylinders which are bored, Nikasil plated and then powder coated externally to give a virtually new set of barrels.

Available for the air cooled Bonneville, Thruxton, Scrambler, America and Speedmaster from 2001-2016.

Please get in touch before purchasing to avoid an unexpected wait time and Shipping to countries outside the UK will be calculated and billed separately as the flat rate shipping doesn’t cover the international cost.

Once your order is placed, your kit will be assembled, this can take up to three weeks as we fully recondition the barrels. Once you have fitted the kit we require your old barrels as a core exchange. Please use the delivery packaging to return your old barrels and please make sure they are cleaned of oil before posting them back to us.