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Old 10-26-2015, 04:52 PM
maniac57's Avatar
maniac57 maniac57 is offline
Old, Fat, and still faster than you
Join Date: Oct 2011
Location: memphis Tn
Posts: 4,486
Default Re: HP Speed carby

RT speed carbs seem to be jetted better stock.
Still not worth much power over properly jetted NT stocker.
Sha clone with air screw is very nice upgrade, but NOT all sha's have it so be careful.
Regular sha no better than anything else.
If more is better, then too much is just enough.
If you can't afford it, build it yourself.
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Old 10-26-2015, 08:33 PM
crassius crassius is offline
Motorized Bicycle Elite Member
Join Date: Sep 2012
Location: USA
Posts: 2,784
Default Re: HP Speed carby

my last 60 or 70 carbs have been the original chinese clone of NT-style - didn't think about it much, but a couple weeks ago I realized that I had not adjusted any of them yet, whereas the NTs usually need at least a needle drop of a notch or two

jeez, till posting this, I hadn't realized how many kits I'd gone thru this summer either
Sometimes I sets and thinks, sometimes I jes sets.
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Old 10-27-2015, 02:40 AM
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Cylon Cylon is offline
Motorized Bicycle Elite Member
Join Date: Jun 2015
Location: Maine
Posts: 223
Default Re: HP Speed carby

Yeah I have purchased 3 dellorto clone's all with the cone filters and none of them have worked with my engine, all caused 4 stroking even with I went through #60 to 80 jets. My stock NT carb works great with original jet. I have a reed on the way in the mail so I figured I would get the NT speed carb and drop the needle to make it richer for the reed. Not looking forward to pulling the head off again to replace the piston with a holed skirt piston. Last time putting the high comp head back on was a pain. Washers are so tiny.
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