Started work on the low mileage Honda tonight to tackle the glitch and see if I could improve carburation. First time working on rvf carbs, and found air filter full of mouse droppings and remnants of mouse meals. The pre filter had been eaten completely, but most of Hondas filter remained intact. So that's probably why she doesn't rev over 12k then. Think the glitch is due stock 108 jets coupled with carbon end can, so 110s and shims are going to be fitted.
Question is, when the carbs came off, two rubbers stayed on the bike, do I put all four back on the bike?
And are plugs supposed to be finger tight?
Cheers guys

racingt wrote: Question is, when the carbs came off, two rubbers stayed on the bike, do I put all four back on the bike?
And are plugs supposed to be finger tight?
Cheers guys

You'll need to put all 4 rubbers onto the engine and tighten the lower clamps before you refit the carbs.

Plugs should be more than finger tight, not sure of the exact torque but that seems too low to me - 'just nipped up' with the socket is my technical term!

Make sure to clean all the pilot jets and emulsion tubes when you have the carbs off, it might not be the main jets responsible for your running issues and it doesn't take long to do this.

If you need assistance there's pics of refitting the carbs and cleaning jets in the carb jetting guide (nc30 carbs but same principles): http://www.400greybike.com/docs.htm

racingt wrote:Think the glitch is due stock 108 jets coupled with carbon end can

Are you sure it's not down to combusted mouse poo?

Thanks Cammo, will do.
The air filter did a great job and kept all the crap out of the engine. Top of the air box was full of remnants of nuts and paper and stuff, everything else dismantled carefully with rags stuffed. Funnily enough the crap had been sucked well into the folds of the filter. First time ive seen a filter do a proper job, and highlights pitfalls of buying immaculate hardly run bikes....

thunderace wrote:

racingt wrote:Think the glitch is due stock 108 jets coupled with carbon end can

Are you sure it's not down to combusted mouse poo?

NO! I hear that gives you an extra 6 hp...

vfrman wrote:

thunderace wrote:

racingt wrote:Think the glitch is due stock 108 jets coupled with carbon end can

Are you sure it's not down to combusted mouse poo?

NO! I hear that gives you an extra 6 hp...

Brilliant guide, Cammo, wish I'd read that before I started.
Carbs incredibly clean inside, no residues or blocked jets. 3 float heights too low by 2-3mm. Stock 108's all round.
Keen to see if it will be 6hp down after clearing mouse crap. Think it might just be run in now!
Cheers

Good work, it's certainly worthwhile cleaning them and setting them up correctly.

Bike sorted with new air filter, reset float heights on 3 carbs , reset idle screws, 110 mains, 0.5mm shims. With carbon can, glitch is virtually gone now, and it spins beautifully up to 13k!
Idles well at 1100rpm. Thanks guys for all tips, and online manual.
Cheers

any sign of foxes in there?