Low down fuelling on a 4JH / 3TJ hybrid
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
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
-
- Familiar Member
- Posts: 286
- Joined: Mon Jul 28, 2008 12:42 pm
Low down fuelling on a 4JH / 3TJ hybrid
My hybrid lacks power and is snatchy below 4000 rpm. Not a problem except for pootling about town & manouvering. It's not something I normally do but if I can improve it then it is a bonus.
Is there any adjustment within the carbs that will help to smooth this out (without going to the dyno man). i.e. changine the idle adjustment screw, the idle jet or the needle position.
Is there any adjustment within the carbs that will help to smooth this out (without going to the dyno man). i.e. changine the idle adjustment screw, the idle jet or the needle position.
-
- Site Supporter
- Posts: 5374
- Joined: Tue Apr 29, 2008 8:59 pm
- Bike owned: Bimota SB6 Yamaha FZR 3TJ x2
- Location: Lundin Taan
Re: Low down fuelling on a 4JH / 3TJ hybrid
have a look at the idle jets and see if they're clean ... is the throttle cable and linkage working properly ???
- cagiva996
- Site Supporter
- Posts: 397
- Joined: Sat May 03, 2008 9:19 am
- Bike owned: 2 FZR4/6,FZS600,YZFR1
- Location: isle of wight
Re: Low down fuelling on a 4JH / 3TJ hybrid
try this cv carb set up guide from factory pro ,i used this to set up my carbs.there is some good info here http://www.factorypro.com/tech/carbtun.html" onclick="window.open(this.href);return false;
-
- Familiar Member
- Posts: 286
- Joined: Mon Jul 28, 2008 12:42 pm
Re: Low down fuelling on a 4JH / 3TJ hybrid
The jets are OK and there's nothing wrong with the throttle actuation.
Thanks for the guide... I reckon it's a bit lean low down, so I'll up the fuel level by 1mm and see how it is.
Like I said, it's no drama.. it just starts proper pulling at 4K and goes nuts at 7K.
Thanks for the guide... I reckon it's a bit lean low down, so I'll up the fuel level by 1mm and see how it is.
Like I said, it's no drama.. it just starts proper pulling at 4K and goes nuts at 7K.