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Post by yamatopdog on Jan 16, 2006 20:59:09 GMT -5
i know it does, ;D,but back to carbs,looking for sugestions for a carb?looking at mikuni vm's but not sure of what bore to order? stock 79 ,will be installing pipe and k+n pod and proably a cam, thinking about a 36mm but don't want to undercarb (or over) looking for some opinions on this,thanks for your advise in advance,bob
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Post by StewRoss on Jan 17, 2006 3:06:13 GMT -5
Hi,
I have Mic 38's on two of mine and they work really well.
If you are going to do what you indictate to the engine then probably either would do. If you're after more mid and lower end possibly the 36...if you're after mid to top end the 38. It also depends on the cam as well. You are able to buy these carbs ready setup for the SR's in the US.
I am also doing up another bike and engine at the moment; I have a Kei Hin CRS38 for it. These are really beautiful carbs. It is a kit that comes from Japan also specially made for the SR.
...for me though....38's.
SR
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Post by sjef on Jan 17, 2006 10:05:00 GMT -5
Hallo
for a 500cc SRengine a mikuni36 will do fine, they are a bit cheaper then keihin
regards sjef
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Post by yamatopdog on Jan 17, 2006 20:53:22 GMT -5
stew and sjef thanks for your input.looking to make a nice streetable bike(cam suggestions are welcome  )but i know with all smaller displacement ;D bikes i twist the throttle till i feel sorry for the cable, and twist it some more ;D.stew is i possible that you know your jetting,needle settings ect in your 38's as well as mods. i'm able to pick up carb thru the dirtbike aftermarket at cost but need a starting point for jetting. thanks once again,bob |
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Post by StewRoss on Jan 18, 2006 1:26:44 GMT -5
Hi,
I have several sets of 38mm figures here and I'll give you some:
Tingate settings:
main jet - 270
pilot Jet - 35
needle - 6F8-middle
needle jet - P6
cutaway - 7MM (from bottom).
My Black Cafe racer:
main jet - 270
pilot Jet - 30
needle - 6F8-middle
needle jet - P4
cutaway - 1.5 cutaway (on slide).
The carby in my black CR is one from a TZ 350. It is a 38mm powerjet carby that I have blocked the PJ off in. It certainly has a better 'bellmouth' entry than the aftermarket ones.
I also understand that the Yam carbs have slightly different dimensions on the slides as well...so you have to use Yam ones. I have never confirmed this though...well, as far as I can remember anyway...
The Sudco ones are easily available and cheap.
I helped a guy do a 38mm Sudco one, I changed slides, needles, NJ's (...emulsion, non-emulsion, etc.) until it was perfect...then I forgot to write the results down...I still wish I'd done it...ah well.
The slide cutaway makes a really big difference and can really assist to get it perfect..but no figures for that one...
Hope that helps somewhat...
SR
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Post by yamatopdog on Jan 18, 2006 18:02:39 GMT -5
thanks stew, your #'s will be a starting point,bob
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)but i know with all smaller displacement ;D bikes i twist the throttle till i feel sorry for the cable, and twist it some more ;D.stew is i possible that you know your jetting,needle settings ect in your 38's as well as mods. i'm able to pick up carb thru the dirtbike aftermarket at cost but need a starting point for jetting. thanks once again,bob