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Post by geoffh on Sept 2, 2020 14:29:06 GMT -5
Plus one with aerox on the jet size,I have an old Yamaha carb that looks exactly like yours it takes6mm jets.
Geoff
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Post by NakedLeo on Sept 2, 2020 15:19:05 GMT -5
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Post by aeroxbud on Sept 2, 2020 16:12:43 GMT -5
I only suggested the Polini one as it's a known brand and quality. For the same price as a bearing that could be anything.
You will probably need a jet somewhere around the 70 to 75 range. But if the 70 is rich you can buy individual jets from Pedparts.
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Post by Zino on Sept 2, 2020 17:01:19 GMT -5
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Post by NakedLeo on Sept 2, 2020 18:59:03 GMT -5
hmm okey i just measured the main jets and these are the measurements i got OVERALL LENGTH = 11mm THREAD DIAMETER = 6mm HEAD DIAMETER = 8mm im really bad with carb stuff so im not really sure what i am looking for
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Post by NakedLeo on Sept 2, 2020 19:10:52 GMT -5
And one more thing, one of the cylinder head stud was loose in the cylinder and just came out The top left one Dont mind how dirty this is, will be giving it a good clean
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Post by Zino on Sept 2, 2020 20:24:30 GMT -5
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Post by NakedLeo on Sept 2, 2020 21:14:45 GMT -5
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Post by Zino on Sept 2, 2020 22:51:34 GMT -5
Yes if you are putting on just the malossi kit . With stock exhaust . You might get a way with just the stock jet or the 70 75 give you alot more room for a safe tune.
With just a kit u grade you often only need to raise the needle and keep the stock jet . Pipes 5%-10 % upjet is usually needed .
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Post by Zino on Sept 3, 2020 7:16:29 GMT -5
If it is easier to get the delloto 6 mm jets in Iceland Grab those they will work you just need to get one of the jet boxes that 70-88 delloto would give you a very large range to dial in
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Post by NakedLeo on Sept 3, 2020 9:31:57 GMT -5
Ait but what are the right spark plugs for this kit ?
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Post by geoffh on Sept 3, 2020 14:28:41 GMT -5
Your old plug should be OK to swap over usually an NGK BR8HS code 4322.
Geoff
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Post by Zino on Sept 3, 2020 16:54:59 GMT -5
ngk BR8HS or ngk BR9HS both work real well with the malossi kit
If you cannot find a ngk brand what ever your current plug is. You would go one notch cooler temp range non projected plug .
So Ngk BPR8HS has a projected tip which puts it closer to the piston head which could be a problem . The P stands for projected.
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Post by NakedLeo on Sept 3, 2020 17:51:08 GMT -5
nice, thanks:)
after i install the kit do i have to break it in ?
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Post by aeroxbud on Sept 3, 2020 18:03:37 GMT -5
You are ment to break them in. It's nearly impossible to ride like that on a 50cc based bike in reality. Just take it easy at first. Then gradually increasing the revs.
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