Jet holder seals on my FZR-R

YAMAEXUP · Post by **YAMAEXUP** » Thu Feb 27, 2014 9:12 pm

I've got a fuelling glitch below 5k & having problems isolating where the problem is. In the past i've tried new ignition leads, new spark plugs, new emulsion tubes. The valve clearances are within spec & compression is good. I replaced the inlet manifolds with late RU items that don't have the dam moulded in place.

So I looked at the seals between the jet holder & the main body of the carb & they looked like this

Taking into account how unleaded petrol contains anywhere between 5% & 10% ethanol...which affects seals, I thought it best to replace them as they could have been leaking between the chambers.

This is what the new ones look like, with an 'AA' battery for comparison

Did it make a differance? Not one jot. But I can now say that they'll last another 40,000 miles

joeboy · Post by **joeboy** » Sat Mar 01, 2014 5:15 pm

I had trouble with the jet holder seals before I was sure they were allowing a little fuel to transfer from the main to the idle circuit and vice versa.

Post by **creedxup** » Sat Mar 01, 2014 9:15 pm

I've changed those seals before and they were flat as a pancake , didn't make any difference either.

Post by **creedxup** » Sat Mar 01, 2014 9:16 pm

I like the way you've done FZR-R by the way