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34 mills or 4 mil stroke?


ONTHAPIPE

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I have a 2006 that is stock except for t-5's and an alba intake with a K&N cone. Would I see a greater increase in performance with 34 mill carbs on the stock crank, or a 4 mil stroke with the stock carbs? I can really only afford one or the other right now. I plan on getting a cub one day but not for a while. I am building the bike for sand, but I also do some occasional trail riding. I found the Keihin 34's on alba for $260 plus about $150 for the intake. Thats about $400 total. The 4mill cranks aren't that much more and I have access to tools and help that can help me perform any motor work needed to install the crank. Any other ideas or plans would be great.

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They may cost the same, but there is a LOT more you are missing on the 4mil. You can't just buy the crank and throw it in there. You will need spacer plate or stroker domes, if you don't have a cool head, you will need your stock head machined for the stroke. If its a longrod crank you will need new pistons. You should get porting to take advantage of the added stroke. Longer swingarm, new chain / sprockets... list goes on.

 

There's probably some other mods out there that would wake it up more than bigger carbs or a stroker crank. Check out some porting first. I would def. go porting before I did a stroker crank. Its cheaper in the long run and still give you good gains.

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They may cost the same, but there is a LOT more you are missing on the 4mil. You can't just buy the crank and throw it in there. You will need spacer plate or stroker domes, if you don't have a cool head, you will need your stock head machined for the stroke. If its a longrod crank you will need new pistons. You should get porting to take advantage of the added stroke. Longer swingarm, new chain / sprockets... list goes on.

 

There's probably some other mods out there that would wake it up more than bigger carbs or a stroker crank. Check out some porting first. I would def. go porting before I did a stroker crank. Its cheaper in the long run and still give you good gains.

I agree with bigred.If I were you I would Leave your engine the way it is for now and get all the needed stuff when you get your cub.IMO

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How much does a good port job cost? If I got the port job, then would the carbs be justifiable?

it all depends on who you get to do the port work but you are looking at anywhere from 250-500 and yes the 34's would then pay off. check herrjugsracing.com kevin is a really cool guy and pretty cheap and from what i know from talking to him and people that runs his motors he knows what he's doing. if you go that route you would want to think about getting your stock crank welded.

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They may cost the same, but there is a LOT more you are missing on the 4mil. You can't just buy the crank and throw it in there. You will need spacer plate or stroker domes, if you don't have a cool head, you will need your stock head machined for the stroke. If its a longrod crank you will need new pistons. You should get porting to take advantage of the added stroke. Longer swingarm, new chain / sprockets... list goes on.

 

There's probably some other mods out there that would wake it up more than bigger carbs or a stroker crank. Check out some porting first. I would def. go porting before I did a stroker crank. Its cheaper in the long run and still give you good gains.

 

not to mention he is saying something about the carbs being 260 bucks , the crank is double that and if you are going to build it your self you got to get some tools you probly dont have yet, and if your going to take it to get built your going to pay 70 bucks an hour in labor so either way its going to cost you much more then the 260 bucks you found those carbs for.but like was said before 34 carbs on a stockj motor is too much anyhow. get your self a prot job and some VForce reeds.

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