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View Full Version : What carb is this?


bkconwayls1
03-12-2007, 09:04 PM
Hey all,

What carb is this, and what should be in it for stock jug, .30 over with FMF pipe? 38.30mm opening

Thanks!
bkconwayls1
03-12-2007, 09:05 PM
2
methyman
03-12-2007, 09:24 PM
Thats a Keihin PWK 38mm air striker
EXtreme-
03-12-2007, 10:37 PM
yep it is.

52, dgh, 175
ChvyCruzen
03-13-2007, 12:12 AM
I hate the dgh needle in my 310. Put in CEJ and it seems much better. I had the CEL in it once and i might go back to that.
GPracer2500
03-13-2007, 01:34 AM
Originally posted by ChvyCruzen
I hate the dgh needle in my 310. Put in CEJ and it seems much better. I had the CEL in it once and i might go back to that.

What was the issue? I'm not questioning your results; I'm just wondering if I could improve upon the DGK that I'm running.
bkconwayls1
03-13-2007, 07:29 AM
This is in it now....does not sound right, though. Stock jug and fmf pipe.

Do these different needles make that much of a difference?

178
DDJ on 3rd clip position
55
EXtreme-
03-13-2007, 07:57 AM
the pilot might be a hair heavy. The main's really close. Needles are always a debate. Try it out and see what it's needs are. Beerock likes the CEL's. I got the DGH reccommended from Mark Baldwin...and I like it ok. Someday, I'll give the CEL a try...just cause.
bkconwayls1
03-13-2007, 10:20 AM
I would like to smooth it out some if possible, between 0 and 1/3 throttle. Would one of these needles be better than the other knowing this?
ChvyCruzen
03-13-2007, 10:30 AM
Originally posted by GPracer2500
What was the issue? I'm not questioning your results; I'm just wondering if I could improve upon the DGK that I'm running.

It seemed like it was too fat at a certain throttle range. The transition from bottom to mid didnt feel good. Put in CEL first and that was really nice, transitioned better and hits better. I tried a CEJ to see how it feels and I think I liked the CEL better. I might try a CGH or something like that, see how it does.
xlr810
03-13-2007, 11:24 PM
Originally posted by bkconwayls1
I would like to smooth it out some if possible, between 0 and 1/3 throttle. Would one of these needles be better than the other knowing this?

Sure you got your air screw adjusted to run right on your pilot?

How about the clip position?

Both of those settings have a big effect on how it runs from idle to 1/3.
Inspector
03-14-2007, 10:24 AM
I hope your 0.30 cylinder is ported and not stock. This would be way too much carb if it is a stock cylinder.
bkconwayls1
03-14-2007, 10:55 AM
I was an idiot, and did not check this stuff(pilot) after I bought it and started riding (burnt piston 5 hours later). I assumed it was the nature of the beast (instant power band), rode only 4-pokes before.

The guy said it was a 310 kit, ported and polished. He is a liar from Granite City, IL., because it is not a 310 at all, so who knows if has been ported....I don't know what I'm looking at.

I do know the needle is in the middle position, but I am left to figure everything else out on my own, with your guy's help.
xlr810
03-14-2007, 11:01 AM
post pics of the internals of your jug if you want to know whether it is ported.

As for tuning-- this is a good guide-- at least a starting point... Written for bikes, but same applies to your R.

http://lukesracing.com/luksr/tips.html
bkconwayls1
03-14-2007, 12:13 PM
I'll post some as soon as I get home. Will it help if I measure the ports? If so, where should I measure?
bkconwayls1
03-16-2007, 02:56 PM
Pictures
bkconwayls1
03-16-2007, 02:57 PM
1
bkconwayls1
03-16-2007, 02:58 PM
2
bkconwayls1
03-16-2007, 02:58 PM
3
HondaATC500X
03-19-2007, 01:36 PM
Originally posted by Inspector
I hope your 0.30 cylinder is ported and not stock. This would be way too much carb if it is a stock cylinder.


I've got a 39 on my 87 motor. Its bone stock other then a modded reed cage and a pipe. It runs fine with it and much better then it ever would have with a stock PJ....