rossoandy broken his bike again!

[motoguzznix]

I happy with result but a little concerned shimming under valves may not b spot on anymore..

Special thanks to the sites owner for creating it.

Andy

 

The distance between upper and lower spring collar should be 35 mm at closed valve for the outer spring. This can easily be measured by a calipper.

 

This corresponds to 31,5 kg seat pressure and makes the valve train reliable up to 8500 rpm where the rev limiter is set. If the distance is at 36mm, the preload is reduced to 25,2 kg and the valve train limit to 8200 rpm. If you hit the rev limiter in case of your next fireblade meeting, the safe valve train limit might be exceeded.

Take these measurements during the 1000 km retorquing.

Setting the spring preload much tighter than the Guzzi specs is not recommended as the valve train forces and corresponding wear increase. You may also come too near the spring block height.

 

Sorry for posting this too late as I couldn't afford the time to read through the post earlier.