Float heights, have i gone mad???

Forum rules
Please can you post items for sale or wanted in the correct For Sale section. Items / bikes for sale here will be removed without warning. Reasons for this are in the FAQ. Thanks
Post Reply
User avatar
Drunkn Munky
Site Supporter
Site Supporter
Posts: 6313
Joined: Thu May 01, 2008 9:37 am
Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
Location: Kent

Float heights, have i gone mad???

Post by Drunkn Munky » Wed Aug 22, 2012 1:43 pm

Right its been a while since ive done the float heights on a NC but not that long. Ive got the float just resting on top of the needle valve without depressing the needle, got my float height setting tool cut to 6.8mm for RVF carbs and resting it on the gasket face the float height measured about 15mm! So float out and bent the tab to get it down to 6.8mm but the floats hit the deck at about 7.5mm.
Double and tripple checked im doing it right then got a spare set of RVF carbs out that im certain i set the heights on before i stored them away, opened them and there nowhere near 6.8mm!! Someone please tell me ive missed something obvious.

User avatar
speedy231278
NWAA Supporter
NWAA Supporter
Posts: 1549
Joined: Tue Jul 03, 2012 11:58 am
Bike owned: RVF400, TZR125, ZXR750R

Re: Float heights, have i gone mad???

Post by speedy231278 » Wed Aug 22, 2012 1:45 pm

Isn't it 12mm for a 35?

Edit: no, it's 12.5mm
Image

User avatar
Drunkn Munky
Site Supporter
Site Supporter
Posts: 6313
Joined: Thu May 01, 2008 9:37 am
Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
Location: Kent

Re: Float heights, have i gone mad???

Post by Drunkn Munky » Wed Aug 22, 2012 2:05 pm

speedy231278 wrote:Isn't it 12mm for a 35?

Edit: no, it's 12.5mm
Yep it is :oops: I looked at that page in the haynes manual over and over again and still thought it said RVF 6.8mm. Right im going back to bed now! :lol:

Thankyou

User avatar
speedy231278
NWAA Supporter
NWAA Supporter
Posts: 1549
Joined: Tue Jul 03, 2012 11:58 am
Bike owned: RVF400, TZR125, ZXR750R

Re: Float heights, have i gone mad???

Post by speedy231278 » Wed Aug 22, 2012 3:26 pm

Any chance of posting a few pics of how to use the gauge? I still can't get my head around it. Do you hold the thing at 90 degrees to the float chamber and gradually tip the carb until the fattest part of the float is touching the gauge, and at that point the lever on the end should *just* be making contact with the valve?
Image

User avatar
Drunkn Munky
Site Supporter
Site Supporter
Posts: 6313
Joined: Thu May 01, 2008 9:37 am
Bike owned: NC30 MC21 TZR FZR GSXR RG MITO
Location: Kent

Re: Float heights, have i gone mad???

Post by Drunkn Munky » Wed Aug 22, 2012 4:04 pm

No, tip the carbs on their side and obverse the way the float needle works, with the needle resting fully in its seat tip the carbs slightly so the tab on the float makes contact with the pin on the needle valve. Now place the tool on the float bowl face so the 12.5mm cutout covers the float at the highest point, it will either be too low or too high and the tool will push the float down. Remove the float and bend the tab whatever way you need to and recheck the height.

I've taken a pic but only on my phone so can either email it too you if you pm me your email or I can post here later.

User avatar
speedy231278
NWAA Supporter
NWAA Supporter
Posts: 1549
Joined: Tue Jul 03, 2012 11:58 am
Bike owned: RVF400, TZR125, ZXR750R

Re: Float heights, have i gone mad???

Post by speedy231278 » Wed Aug 22, 2012 4:20 pm

Later will be fine, I *still* have no idea when my fuel pipe o-rings will arrive.. :-(
Image

Neosophist
Moderators
Moderators
Posts: 8172
Joined: Fri Jul 04, 2008 1:01 pm
Bike owned: CBR954

Re: Float heights, have i gone mad???

Post by Neosophist » Wed Aug 22, 2012 5:32 pm

http://www.factorypro.com/tech_tuning_p ... edure.html

Like this (tilting the carb until the float drops in and doesnt compress the pin)

And yes DM the float height on the 35 is 12.something :)
xivlia wrote:i dont go fast on this bike so really do not need a rear brake.. /
vic-vtrvfr wrote:Ask xivlia for help, he's tackled just about every problem u could think of...

Post Reply