76 elsinore 125 jetting

longgone008
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longgone008
Edited Date/Time 12/15/2012 7:03am
doing a 34 mikuni carb conversion, any help where to start on jetting for race setup?
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newmann
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newmann 11/28/2012 6:27pm
11/28/2012 6:27pm
Here is a good starting point. Runs excellent with most current pipes, Circle F, Jemco, Pro Form. Would not recommend one of the newer stamped DG pipes though, waaaayyy too high revving.

slide 2.5
needle 6dh2 clip 2nd from top
needle jet 159Q0
pilot 35
main 300
sgthubbard#60
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sgthubbard#60 11/29/2012 5:21am
11/29/2012 5:21am
Been meaning to ask the same question about the 32mm Mikuni on my 76 with the high pipe and Mugen replica silencer.
newmann
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newmann 11/29/2012 7:06am
11/29/2012 7:06am
Try the same with the 32. If it's a screamer, go up on the main. Don't know that I've ever needed anything more than a 300 in any of mine .....except maybe when the kids or Warren Reid rides them.Blush
sgthubbard#60
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sgthubbard#60 11/29/2012 8:59am
11/29/2012 8:59am
Great, thanks!

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longgone008
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longgone008 11/29/2012 3:35pm
11/29/2012 3:35pm
thanks for the info will save hours, is the 32mm a better race setup than the 34?
newmann
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newmann 11/29/2012 7:13pm
11/29/2012 7:13pm
Depends on the exhaust. Different pipes are like night and day difference. Wrong pipe choice will have you hating the bike.
longgone008
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longgone008 12/9/2012 4:53am
12/9/2012 4:53am
tested yesterday with the 32 stayed with 3.0 slide 3 down on clip results where good , going to try the 34 next weekend as bike still wants more fuel i think even though plug looked perfect.This bike has a retro rocket pipe that i know nothing about is there something better out there i should be looking at, trying to get more on the bottom and rev quicker.Suggestions on clutch?
SEEMEFIRST
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SEEMEFIRST 12/11/2012 2:49am
12/11/2012 2:49am
Not trying to be a smart ass, I'm already good at that, but has an Elsinore from those days ever had any bottom end. None of mine ever did. 2-74s, 1-75, and 2-76s.Smile
longgone008
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longgone008 12/11/2012 7:08pm
12/11/2012 7:08pm
was referring to the retro rocket pipe is it hurting the bottom end as i know nothing of this pipe and i am sure there is something better out there
newmann
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newmann 12/11/2012 7:34pm
12/11/2012 7:34pm
I think the retro-rocket pipe is sold by Vintage Iron. Quite possibly may be made for them by Pro-Form. Should both be good pipes. The new stamped steel DG pipes you see on Ebay work good on a 74 cylinder with a 30-32mm carb but not good at all on the 75 or 76-78 with 32-34mm carbs. Very high revving pipe. CircleF and Jemco both make good running pipes for the CR's. The old DG and FMF pipes are a mixed bag as they made quite a few different pipes to compliment different engine packages and skill levels back then. Steer clear of spending big bucks on something rare that may or may not work.

And a stock 74 CR125 cylinder with a high comp head, 30mm Mikuni and the right pipe will actually have some decent low end power. Won't rev out like you'll want it to though.
newmann
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newmann 12/11/2012 7:35pm
12/11/2012 7:35pm
longgone008 wrote:
was referring to the retro rocket pipe is it hurting the bottom end as i know nothing of this pipe and i am sure there is...
was referring to the retro rocket pipe is it hurting the bottom end as i know nothing of this pipe and i am sure there is something better out there
Keep your eyes peeled for a decent looking stock 75 CR125 pipe and exhaust manifold. Try it and see if it gives you any added low end.
longgone008
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longgone008 12/11/2012 7:54pm
12/11/2012 7:54pm
thank you sir i knew you had the right set up
FlashptA10
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FlashptA10 12/13/2012 12:15pm
12/13/2012 12:15pm
I have a stock pipe off a 1977 Cr125. I believe the 76 to 78 were the same pipe as the 1975 except they used the larger cylinder exhaust flange. I think both the 77 and 78 came with the ridiculos large silencer that erybody removed immediately. Newman can probably tell usif this is true. The pipe I have is in near perfect condition.
you can go to one of the honda parts web sites to check part numbers. They show the parts but are not available.
Kevin
newmann
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newmann 12/13/2012 1:04pm
12/13/2012 1:04pm
FlashptA10 wrote:
I have a stock pipe off a 1977 Cr125. I believe the 76 to 78 were the same pipe as the 1975 except they used the...
I have a stock pipe off a 1977 Cr125. I believe the 76 to 78 were the same pipe as the 1975 except they used the larger cylinder exhaust flange. I think both the 77 and 78 came with the ridiculos large silencer that erybody removed immediately. Newman can probably tell usif this is true. The pipe I have is in near perfect condition.
you can go to one of the honda parts web sites to check part numbers. They show the parts but are not available.
Kevin
The 76-78 looks almost identical to the 75 model but overall is a little larger. The exhaust manifold as you mentioned is smaller on the 75and the 75 outlet is smaller diameter which would create a more backpressure. Little better low end from my experience.

Yeah, that gigantic spark arrestor is funky looking for sure but I would still like a NOS one for my project bike. Too damn expensive!

You wanting to sell the near mint pipe you have?
FlashptA10
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FlashptA10 12/14/2012 5:56am
12/14/2012 5:56am
Yes I am starting to sell off some of my bikes and parts. e-mail FlashptA10@aol.com
Kevin
longgone008
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longgone008 12/15/2012 7:03am
12/15/2012 7:03am Edited Date/Time 12/15/2012 7:05am
took off 32mm carb put on 34 carb today bike is like day and night now ,only got about 10 minutes of track time inbetween rain drops use mr newmann specs they are spot on! now its the bike i remember

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