Carburettor advice for performance

Dennis.rose
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Carburettor advice for performance

Postby Dennis.rose » Mon Jun 11, 2018 5:57 pm

Hi Guys ,
Need a bit of advice. I have a 64 Arrow with the standard carb , I was going to fit the larger mono bloc 1x3/16 for extra zip , Some one recommended that I fit a mikuni carb , I plan to do some minor tuning , ie , enlarge the inlet port , elongate the piston window and matching spigot in the barrels , increase the compression ratio to 12 to 1 and smooth out the exhaust port in the barrels , what is your advice , would the larger mono bloc be better than the mikuni carb ? cheers

Nige W
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Re: Carburettor advice for performance

Postby Nige W » Tue Jun 12, 2018 11:16 pm

Hi. I don't have the answer, but was considering going down this route with mine at some point so will be interested in what advice might come up. Will be interested to hear what difference it makes to your bike.

nevhunter
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Re: Carburettor advice for performance

Postby nevhunter » Wed Jun 13, 2018 2:53 am

A bigger bore carburetter is more sensitive for tuning. 2 strokes are more critical than four strokes generally with mixture and easier to melt a hole in a piston Naturally what advantage you get will be at higher revs where you will maintain the torque for longer (if it works) most of the big advances in two strokes is in the schneurle ports plus reed valves and the expansion chamber design. The iron air cooled cylinders are a limit on sustained power. They just don't get the heat away if your motor is in a high state of tune. Nev

ken-drink
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Re: Carburettor advice for performance

Postby ken-drink » Thu Jun 14, 2018 12:10 pm

this is what i fitted to my leader, works well
viewtopic.php?f=20&t=7762
Ken

bh.sprint
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Re: Carburettor advice for performance

Postby bh.sprint » Thu Jun 14, 2018 3:10 pm

Re the Arrow tuning. -- Most of the articles I have seen assume you want max power for racing etc but I've not seen very much for those who want a bit more power but also need to keep the engine flexible for road use. The best person to talk to if you want the later is Ron of Fahron Engineering, he can give you the port measurements for use with original Ariel pistons and the Suzuki pistons. He is based in Linby Notts . Some of the Arrows he has worked on can easily keep up with modern traffic on A roads.

Brian H.

Dennis.rose
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Re: Carburettor advice for performance

Postby Dennis.rose » Fri Jun 15, 2018 5:39 am

thanks for your advice guys, that's what I need Brian , to keep up , not racing , ill give Ron a ring from Fahron , see what he recommends ,
cheers , Dennis


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