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 Post subject: H1 carbs on an S3 or S2?
PostPosted: Wed Jul 30, 2014 6:54 pm 

Joined: Mon Mar 12, 2012 8:16 pm
Posts: 515
Anyone running these on their S2 or S3? I have a set of nice adapters that position carb exactly where the stock carb would be. I've got a bunch of H1 rebuildable carbs lying around. I need to move up in jet size and thought this might be a better idea. :?:


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PostPosted: Wed Jul 30, 2014 7:13 pm 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2691
Location: Dandridge, TN, USA
If you use H1 on S2/3 remember to jet up or holes can develop.

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PostPosted: Wed Jul 30, 2014 8:40 pm 

Joined: Mon Mar 12, 2012 8:16 pm
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Burning holes in pistons? Why would stock H1 jetting be so lean????

:think:


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PostPosted: Wed Jul 30, 2014 8:44 pm 
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Smaller pistons means less vacuum to pull fuel thru jets... so jets need to be larger to compensate.

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PostPosted: Thu Jul 31, 2014 3:43 am 
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Joined: Fri Jun 10, 2011 11:04 am
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Location: Capitol of Ca, USA
mraxl wrote:
Smaller pistons means less vacuum to pull fuel thru jets... so jets need to be larger to compensate.

(Speaking for myself) you learn something new every day! :idea:

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PostPosted: Thu Jul 31, 2014 6:19 am 
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Joined: Wed Jun 08, 2011 10:28 pm
Posts: 1558
Location: Tampa Bay Florida
Agent H2 wrote:
I have a set of nice adapters that position carb exactly where the stock carb would be.

Any pics Bill? Are they just modified H1 manifolds or has someone been very creative? :think: Been thinking about doing that carb swap myself, using the ones I bored out to 30mm. (after I "correct" them) When life gets out of the way of all my other plans (dreams?) :wtf:

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PostPosted: Sun Aug 03, 2014 2:45 pm 

Joined: Mon Mar 12, 2012 8:16 pm
Posts: 515
Someone just hacksawed the round carb mount off of an H1 and hacked of the S3 carb mount portion and heli arched the two pieces. Voila..... I can send a pic if your interested in seeing them....


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PostPosted: Sun Aug 03, 2014 2:49 pm 

Joined: Mon Mar 12, 2012 8:16 pm
Posts: 515
I used to think the stock air box lessened the reversion thus helping low end but I think it's just the fact that it's closed up a big more and slightly choking the carbs to draw more fuel. Smaller slugs draw less fuel.....duh. I think I knew that at one time but I forgot that and where the cake is hidden in the fridge. Thanks.


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