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BBK brands
by: uncleozzy - Mar 25, 2018 17:47:16 GMT -5
via mobile
Post by uncleozzy on Mar 25, 2018 17:47:16 GMT -5
I have a high performance exhaust the motor just backfires a lot. It wont perform with anything I do want one that won't break the bank!! What kind of exhaust can I buy thats fairly cheap.and will work with my BBK? I have no idea about this I need some good videos to watch about exhaust systems
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BBK brands
by: uncleozzy - Mar 25, 2018 17:49:45 GMT -5
via mobile
Post by uncleozzy on Mar 25, 2018 17:49:45 GMT -5
Do you think 7g or 9g rollers would work on my scoot for the variator?
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BBK brands
by: onewheeldrive - Mar 25, 2018 21:34:23 GMT -5
via mobile
Post by onewheeldrive on Mar 25, 2018 21:34:23 GMT -5
Do you think 7g or 9g rollers would work on my scoot for the variator? Yeah. Each gram you go, whether up or down, probably changes the rpms by maybe 500 or so +/-. I like to keep mine between 7k and 7.5k at top speed or pretty close too max speed. 9g will probably be too heavy, unless you weigh 100lbs. I’d start with 7 or 7.5g and work from there. It’s trial and error to get it just right. If I could tell you one weight would be perfect the first try I would. If you knew the weight of the rollers in there already, you could work from there. Did you change the jet when you put your backfiring perf exhaust on? |
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BBK brands
by: uncleozzy - Mar 26, 2018 12:02:27 GMT -5
via mobile
Post by uncleozzy on Mar 26, 2018 12:02:27 GMT -5
I put the stock exhaust back on and a #  jet in tge carb it starts up first shot and runs beautiful. I just need to tweek the air mixture screw and then it should be golden it runs beautiful on the # and the#34 needle jet. I guess I lucked out with the it was the biggest one I had. Cant wait to do my cvt I'm going with 1500k springs and 7 or 8g rollers. I weigh 215 so I'm hoping that works |
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BBK brands
by: uncleozzy - Mar 26, 2018 12:07:40 GMT -5
via mobile
Post by uncleozzy on Mar 26, 2018 12:07:40 GMT -5
I wish I could figure out what's up wih this exhaust maybe it will be ok with the jet. It backfires through the exhaust. My timing is perfect so I don't know what's up with that probably because it's a two fast moto they suck |
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BBK brands
by: uncleozzy - Mar 26, 2018 17:54:15 GMT -5
via mobile
Post by uncleozzy on Mar 26, 2018 17:54:15 GMT -5
Did you know that you can't buy a 50cc high performance carb with air adjustments!!!!
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BBK brands
by: pistonguy - Mar 27, 2018 17:27:20 GMT -5
Post by pistonguy on Mar 27, 2018 17:27:20 GMT -5
Did you know that you can't buy a 50cc high performance carb with air adjustments!!!! Nope... the only air screw your going to get is the low end air screw.. |
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BBK brands
by: pistonguy - Mar 27, 2018 17:27:56 GMT -5
Post by pistonguy on Mar 27, 2018 17:27:56 GMT -5
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BBK brands
by: pistonguy - Mar 27, 2018 17:29:24 GMT -5
Post by pistonguy on Mar 27, 2018 17:29:24 GMT -5
This is not a real good pic I had on file. but get the gist on what your working with and what jets are working at the different throttle positions..  |
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BBK brands
by: uncleozzy - Mar 28, 2018 7:47:54 GMT -5
via mobile
Post by uncleozzy on Mar 28, 2018 7:47:54 GMT -5
Thanks bro everything helps!! Blessings!!
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BBK brands
by: uncleozzy - Mar 28, 2018 9:24:17 GMT -5
via mobile
Post by uncleozzy on Mar 28, 2018 9:24:17 GMT -5
Why would a exhaust make my engine backfire? it backfires through the exhaust!!
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BBK brands
by: uncleozzy - Mar 28, 2018 9:26:16 GMT -5
via mobile
Post by uncleozzy on Mar 28, 2018 9:26:16 GMT -5
Even with the BBK and big heads it still needs the stock to run right. The hi perf backfires
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BBK brands
by: uncleozzy - Mar 28, 2018 14:36:40 GMT -5
via mobile
Post by uncleozzy on Mar 28, 2018 14:36:40 GMT -5
I put a 94 needle jet ( idle jet) in and a main jet in the piece of shiitake carb and it flies I weigh 215 and no power loss up hill I can actually increase speed uphill!!! Running great I can't wait to do my cvt with a 2.  final gear ratio. This is going to be balls to the wall. |
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BBK brands
by: uncleozzy - Mar 28, 2018 14:37:50 GMT -5
via mobile
Post by uncleozzy on Mar 28, 2018 14:37:50 GMT -5
Oops the idle jet is a # 34 my mistake
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BBK brands
by: pistonguy - Mar 28, 2018 15:07:30 GMT -5
Post by pistonguy on Mar 28, 2018 15:07:30 GMT -5
Even with the BBK and big heads it still needs the stock to run right. The hi perf backfires No not really. a true open exhaust once you chop the throttle will back fire completely normal and nature if the beast. Watch a pro dirt or flat track and when they chop the throttle going into the corner they all pop.. You can fatten up the jetting to minimize it but thats about it. I just deal with it.. |
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jet in tge carb it starts up first shot and runs beautiful. I just need to tweek the air mixture screw and then it should be golden it runs beautiful on the #
final gear ratio. This is going to be balls to the wall.