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Discussion Starter · #1 ·
so took the bike out the girl friend loved it must admit it wos so slugish and top end wosnt that fast and it keepet cuting out if you didnt rev it but i dont have a air filter just a stocking thick sized one over the air filter but still it also didnt have that much get up and go the top end wos okay but then when i got on my polini its like a bullet i wos scerd when i got on my polini because arfter being on the b1 eninge bike it wos so diffrunt so is the carb not good for the bike?
 

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any one with a b1 rep type engine can tell me there jets and carb type ill copy prohaps
Jetting is a science and going off some elses jetting can and will just throw you off unless they live in the same town and yet them having the same exact setup as you will be quite unlikely..............

It sounds like your bike has severe reed flutter or its running a tad too rich............

Pull the sparkplug to see how its burning and also do a squish calculation and a compression test on the engine to see if it falls within specs..........

You should be running the PHVA 17.5mm carb with 88 mainjet stock on that engine......
 

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Man, that's the honest truth, every engine is different, tried my best to make the twin drag engines the same and they are alittle different. The best one will go up front and pull the second one along, hopefully,lol.
It's a hit or miss thing and then the air get hotter or colder and messes with yor head again.
 
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