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Old 01-04-2006, 08:58 AM   #98
bmwhd OP
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Joined: Dec 2003
Location: Texas
Oddometer: 1,476
Originally Posted by gybeman
Can you explain what you are saying? re: 'The 250 already has in effect what results from doing the mod on the 300.'

I'm saying the 1" crank vent hose to the airbox is restricted internally by a plug which only has a 1/8" hole in it. This in effect causes a crankcase pressure & vacumm because it can't breath fast enough at higher rpm. Remove the plug and voila... it revs freer.
The plug's not there on the 250 and the hose is already routed the way it's suggested to do it in the mod documentation for the 300.
Todd R.

'78 R80/7
'06 FJR1300A

"Gentlemen, gentlemen, be of good cheer, for they are out there and we are in here!" - Robert Culp, attributed by Hugh Hefner as the official slogan of the Playboy Mansion

bmwhd screwed with this post 01-04-2006 at 09:42 PM
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