ady witting Posted December 30, 2015 Report Share Posted December 30, 2015 Does anyone know what jets I should be running on my carb its a kelhin flat slide Quote Link to comment Share on other sites More sharing options...
michael_t Posted December 30, 2015 Report Share Posted December 30, 2015 What do you have it in now and how is your plug looking? Altitude? air temperature? high performance or just farting around? Quote Link to comment Share on other sites More sharing options...
hugh_b Posted December 30, 2015 Report Share Posted December 30, 2015 I'm experimenting with mine at the moment. I've just popped a 48 pilot in on reccomendation of one of the MRS British riders and have been advised to run the air screw 1/2 to 1 full turn out. I'm going to try this first and i'm hoping it will be spot on. Chris @ splatshop has suggested the following: 48 pilot 128 main 3 1/2 slide raise the needle one clip Obviously the slide is quite expensive so he suggested a richer needle if i didn't want to spend the extra on the slide. Quote Link to comment Share on other sites More sharing options...
steve_earle Posted December 30, 2015 Report Share Posted December 30, 2015 That setup should work, It will be on the rich side but will help with detonation. I have just set up a 14 factory with a 48 pilot, 128 main and the std 4 slide with a jjh needle clip in middle, Its had some ignition and compression mods and it runs very smooth with no detonation, A tad rich off the bottom but it's being ridden by a novice so it will stay that way till he improves. You could go to a 45 pilot with the 4 slide and change to a jfh neddle, This is more cost effective than buying a slide. If you want an aggressive setup 3.5 slide JJH needle, 125 main and a 45 to 48 pilot, Needle 2nd from bottom. With a 48 pilot the air screw will be 1.5 to 2 turns. What symptoms are you getting? If it's a new Sherco I would imagine it has an air leak as the stupid plastic manifold is a piece of junk, Sherco are aware of it and just supply a foam gasket to help it seal. You will have to order a box of manifolds at 50 quid each to find an almost good one! Speak nicely to Chris at splatshop and he will try to find you the straightest one possible. Quote Link to comment Share on other sites More sharing options...
hugh_b Posted December 30, 2015 Report Share Posted December 30, 2015 (edited) The standard out of the crate jetting has a 45 pilot and 3 slide. The bike runs a little weak hence making it a tad richer. The new airbox makes has made a lot of difference in how the engine runs. To the extent that Chris @ splatshop thought he had an air leak on his new bike as it was running so weak but in fact it was just jetting. He suggested he may go a little richer still! Edited December 30, 2015 by hugh_b Quote Link to comment Share on other sites More sharing options...
shercosi Posted December 31, 2015 Report Share Posted December 31, 2015 am I missing something here but surely you shouldn't have to start spending money on jets and slides etc having just forked out 5k on a new bike my sherco is nearly 13 yrs old been mine from new and never been altered and is spot on 2 Quote Link to comment Share on other sites More sharing options...
ady witting Posted December 31, 2015 Author Report Share Posted December 31, 2015 Thanks Guys for all your comments. Will take your advice Quote Link to comment Share on other sites More sharing options...
nigel dabster Posted December 31, 2015 Report Share Posted December 31, 2015 am I missing something here but surely you shouldn't have to start spending money on jets and slides etc having just forked out 5k on a new bike my sherco is nearly 13 yrs old been mine from new and never been altered and is spot on Funny that as I always changed the pilot jets on my 03 04 and 05 sherco. Perhaps yours isnt as good as you think. Quote Link to comment Share on other sites More sharing options...
ady witting Posted January 3, 2016 Author Report Share Posted January 3, 2016 I've just changed my carb settings now, left the pilot jet at 45, changed the main jet from a 125 to a 128 and needle setting to 1 up from bottom, going to try this setting at trial on Sunday (Lincoln). hopefully this setting should be ok. Quote Link to comment Share on other sites More sharing options...
Twowheelslide Posted February 20, 2023 Report Share Posted February 20, 2023 Hi folks, has anyone got any info on carb jets for the newer Sherco 300? The standard 45 pilot and 125 main jet was very lean on my 2022 bike when I got it recently. I've changed the main jet a few times and even at a 135 I was still getting detonation/ pinking noise. I've had a 125, 128, 130 and 135 in it so far. Needle is on the middle clip. Thanks. Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.