Sunday, January 8, 2012

I just put a Vance and Hines pipe on my 1989 ninja 750. what jet kit do i need?

I don't know about V%26amp;H but on FMF's site they have an applet that you can put the year, make, and model and it will tell you what jets to use. You can also ask these guys:





http://www.cdracingonline.com/id24.htm|||Hi, sorry this is off topic but you seemed to help me the most at my question and i need help picking out the amp. please email crapman64@tmail.com if u can help. thank you

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|||go to a cycle shop and give them the stats of your bike.. they can tell you what you need. and.. just because you put a custom exhaust on the bike, doesn;t mean it's a hot rod...|||If you have to ask this question, then you're lacking the knowledge needed to properly TUNE any kind of jet kit to actually get any sort of performance. If you Want performance (and not some weird bragging rights and a poorly running bike), you should take the bike to a shop with a Dyno and have it tuned for you.





If you really want to try, then you can opt to do a Cheap 'kit' by using 2.5mm washers to riase the needle, installing a larger main jet and setting the air/fuel mixture screws to 2.5 turns out, then syncing the carbs and doing a few plug cops. (again, if you don't understand this, you may want to reconsider taking on the work ~ if you mess up, your bike may not run at ALL afterwards, but will mostly likely just run poorly).





The next option would be to buy a kit, Factory Pro is my prefered vendor because I think they work a little better/are less picky about settings, but Dynojet is a long standing standard. Follow the directions (except in the Dynojet kit, don't drill the slide if it tells you to), and you'll probably get a passably running bike.





Are you getting the feeling that tuning carbs takes a bit of knowledge? I hope so. It's Entirely possible to Gain that knowledge through trial and error (many old-timers learned this way, and it served me well), but expect to pull your carbs 40~60 times over a few days and take LOTS of notes. Only change one thing at a time... and hopefully you'll be able to notice the changes and setup your carbs in the best way possible short of using a dyno with a electronic gas analyzer.

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