Jetting Solution

[biglou226]

Well I am new to the whole 2 stroke scene and so far it is not as simple as some may say. I have a 98 Banshee that I have tweeked a little but I need some guidance on the carb situation. First I need to make sure my jetting is right then also I need to make sure they are sync'd properly. So far I have 66mm pistons(.080+ Bore), Toomey T5 Pipes, Adj. Timing Plate(Need to check the advance), Billet Cluth Basket, Hinson HD Cluth, Pro Design Cool Head(22cc Domes), but unfortunately I'm still running the stock carbs w/ the tors system. Any illustrated instruction someone might have on the carb sync would be greatly appreciated. As far as the jetting i have an idea of what it should be at. Main Jets should be 370 - Pilot Jet should be 30 - and the needle clip should be at the 3rd - 4th ring. I also prolly need to adjust idle air screw too im sure, but again i need some guidance on that. I appreciate all the info you guys already have posted I have spent weeks pickin through all the different posts and theres allot of useful resources here. Thanks allot guys/gals.

[badassbanshee479]

first off I would get a tors eliminator kit, then we can walk ya through sincing your carbs. or FAST makes a tool that you stick in your carbs while the bike is running to set the slides the same at idle and at part throttle so your carbs are perfect. Also your main and pilot seems alittle big to me. What are you running for filters?? do you run an air box? how about the lid? are you running toomey needles?? how many grooves are on them? what is your elevation?

[biglou226]

first off I would get a tors eliminator kit, then we can walk ya through sincing your carbs. or FAST makes a tool that you stick in your carbs while the bike is running to set the slides the same at idle and at part throttle so your carbs are perfect. Also your main and pilot seems alittle big to me. What are you running for filters?? do you run an air box? how about the lid? are you running toomey needles?? how many grooves are on them? what is your elevation?

well i bought it used and after about 2 mos i melted the top of the right side piston. the cap on that carb came off twice and i think that was part of why it detonated so bad, cause there was way to much air. but i have a k&n 2 into 1 filter with the foam pre filter and no snorkel or airbox lid. i dont know what jetting has been done nor do i know when the last time they were sync'd, but being that i just spent the money rebuilding the top end i would hate to burn it up cause of improper jetting. those numbers maybe a lil big like i said im new to this and after my calculation thats what i came up with but please feel free to make any corrections you can think of. also i plan to upgrade the carbs in the next few months and go with 34mm mmikuni flatslies. i just want to be able to make it run ight like it is for now at least to ride some and break in the new top end. thanks for all your input your help is much appreciated.

[badassbanshee479]

I have a play bike that has t5's pod filters, milled head and a timing plate at +4, I am running 350 mains and 27.5 pilots in it. I am also running tommey needles in the middle spot. I am at 900ft above sea level also.

 

Best thing you can do is do a plug chop. thats the only way you can be certain your jetting is right.

http://www.dfn.com/benkaren/plugchop.html

[biglou226]

I have a play bike that has t5's pod filters, milled head and a timing plate at +4, I am running 350 mains and 27.5 pilots in it. I am also running tommey needles in the middle spot. I am at 900ft above sea level also.

 

Best thing you can do is do a plug chop. thats the only way you can be certain your jetting is right.

http://www.dfn.com/benkaren/plugchop.html

not to sound blunt but im not really interested in what mods and jetting other people are having. i need more specific instruction for my own. also im sure there is some way to get a close estimate as to what the jetting should be just by knowing how it is set up, and chopping plugs all the time seems a bit troubling just to check the jetting. it just seems that there would be a more sensible way of doing these things. again like i said im not tryin to sound too blunt or insult anyone by any means im just new to the 2 strokes and seems to me there would just be more reasonable ways to do things. thanks again for everyones input.

[biglou226]

not to sound blunt but im not really interested in what mods and jetting other people are having. i need more specific instruction for my own. also im sure there is some way to get a close estimate as to what the jetting should be just by knowing how it is set up, and chopping plugs all the time seems a bit troubling just to check the jetting. it just seems that there would be a more sensible way of doing these things. again like i said im not tryin to sound too blunt or insult anyone by any means im just new to the 2 strokes and seems to me there would just be more reasonable ways to do things. thanks again for everyones input.

well i think my jetting is ok i went out and tore down the carbs after talkin t a bike mechanic and cleaned the hell out of em and also i realized i had the damn slides mixed up so problem solved everything is great now lol

[letsgetthisdone]

not to sound blunt but im not really interested in what mods and jetting other people are having. i need more specific instruction for my own. also im sure there is some way to get a close estimate as to what the jetting should be just by knowing how it is set up, and chopping plugs all the time seems a bit troubling just to check the jetting. it just seems that there would be a more sensible way of doing these things. again like i said im not tryin to sound too blunt or insult anyone by any means im just new to the 2 strokes and seems to me there would just be more reasonable ways to do things. thanks again for everyones input.

 

WOW. He is tryin to help by saying he has a similar setup and what jetting he is runnin and you come off with that.