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Old 04-29-2013, 09:37 PM   #1
jjwithers OP
Gnarly Adventurer
Joined: Apr 2011
Location: So-Cal
Oddometer: 111
Question R80GS carbs on R75/5 question + Siebenrock


I just rebuilt a R75/5 from the ground up and added the Siebenrock piston/cyl kit that supposedly is a 20% increase in power. + Lightened flywheel.

My R75/5 carbs were a bit too worn and the choke was leaking a bit and i couldn't get a good idle.

I got a set of Very good condition 32mm carbs that were from a R80GS. I took them apart and cleaned just a wee bit of crud out.

While they are apart, I'm wondering if I should leave the jetting and needle positions the same?

Or should I put the R75 idle/needle/main's in the new carbs?

The bike will supposedly be close to a R90 in power due to the piston kit but I'm not sure how the jets will effect or help/hurt the bike.
Ultimately, i want something reliable.

Does anybody have the Bing guide for jetting?

Thanks in advance.
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