shims are tight on intake no clearance at all, both shims are 2.30mm i think what i need are 2.15 that should give me .006 clearence what do you guys think, also i am replacing stock piston with a je 11.5.1 any pointers thanks.

 

Going from 2.3 to 2.15 would be fine.
The ratio is not one to one, but you should end up around .005 clearance.
Since you have no clearance, ask the dealer if you can buy a set of 2.10 also, and you will return what you do not use.
Better to buy extra's right away.
Also, buy the shims at a BMW dealer or a Yamaha dealer, they charge only $4.00,
the DS dealers want $10. Just ask for 29mm shims.

OMR

 

thanks OMR for tip , just pulled head and jug off today, with a little grinding here and there, but piston is off just waiting for parts to get here, i will do some work on the head since its off, might polish exhaust side a little, any extra addvice is always welcome.

 

Is a Shim a Shim, as long as it is 29mm???

 

Maxbomber,
Is your head the original 2000? Have you ever changed the springs?
If original, change the springs and new oil seals. If you want alittle free horsepower, take your valves to a automotive machine shop and have the valves undercut.
The intakes are pretty good, but the exhaust are terrible, try to cleanup the exhaust.



DragonDJ11,

You got it, a shim is a shim. Local dealer sell both yamaha and bombs. He always sells me the yamaha shims, he feels guilty charging $10. BMW sells a f650 bike that uses the same motor as a DS.

 

valves and springs are stock ,might replace next year, i do have seals ordeared along with the shims and gaskets and the piston,when you say undercut exhaust valves what do you mean, i do plan on taking them off and have them cleaned, also how much of a diffrance is my jetting going to be.