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What size carbs you guys running on 4mm cub


Lethaface

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Fixin to buy some carbs and was curious what you guys run on your cub's..I will be on gas and will run a airbox with pro flo adapter and no lid..Also just have a clean up port and will be running Shearer SB inframes.. I have considered the 36mm Mikuni TM's and 38mm TMX carbs but just wanted to know what you guys run/recomend..

Edited by Lethaface
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39 pwks on gas for awhile then converted them over to alky. I think you would be good with the 35 pwks talk to dave about this, he had the same setup you are tryin to put together. shearers and 35pwks. his bike ripped oh and you have to ditch the air box when running small bore in frame shearers, there is no room for the stinger tubes. just get some k and n clamp ons with pre filters

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I may have to run CPI's if thats the case then..Due to the riding area/conditions i have to have the airbox..I'm glad you mentioned that :beer:

 

 

what style of riding are you doing will depend on what carbs you go with. Me I would go with 39 pwk's but I dune ride 99.9% of the time

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I honestly think 35's are key...as said, ran them on mine. Just a clean up port....sucks you have to run an airbox, but with any inframe drag pipe, you're gonna have to get creative routing the stinger tubes!

 

I think 39s are overkill unless you're running alky, especially with an airbox.

 

However, I met and saw JT (badass479...) at Silver Lake end of 2005 with his bike, as said, on gas with 39s...and that bike flat out ripped. It convinced me I was getting a cub setup....

 

I still remember how impressed my friend Bob and I were watching JT run that thing down the strip at Silver Lake dunes...

 

I'm glad I finally got something to run with him...:)

 

I think you'll be fine with CPIs or Shearers...but, as said, you're gonna have to get a little creative. CPIs don't exactly fit real well under the seat, either....

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I have ran the CPI's with the box on my bike before the new build and managed to get them in there just fine.. Are the PWK's a better design than the PJ's? I'm wondering if it was a good idea to sell my 34Pj's to end up going to a 35pwk..

 

CPI's with the box

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Edited by Lethaface
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Cool beans...

I saw a picture of I **think** Jbooker's bike (not 100% sure) with CPIs....and they looked really, really cramped.

 

I know the main dif between the PJs and PWKs are the choke/idle adjustment on them is different...

I think you'd have been fine with either carb.

 

Everywhere I looked and everyone I asked said PWKs, and I got mine used from Bkabina for a great deal I couldn't turn down (of course he bought them back for an even better deal...)

 

To help a little more, on mine I ran CEL needle middle clip, 48 pilots and 150 mains...

That should get you close....

 

And, if you need intakes, hit me up.

The UPP black intakes I used for my 35's won't fit my 39's I'm using for Alky...I'll give you a good deal on 'em!!

They are nothing fancy, and have the crossover tube nipples built in.

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I think it's all about preference, to be honest.

I think the 34's would've worked fine. Some people are die hard PWK fans, some PJs...and some love the Mikunis because they can be switched back and forth from alky to gas if needed (removable dump tubes...)

 

Anytime, letha...post up some pics when you get done with the build!!

 

I hope SoCallinit enjoys my 4 mil cub motor as much as I did!!!

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I didn't think it was a must switch for the 1mm..I was told by a buddy that people were running 41-42mm carbs on the cubs so i just assumed that the 34's were to small and i would end up with 38's or so..SO i sold the 34's on ebay to cover the price of my new carbs..My intentions wasn't to only go up 1mm but if thats what will work, well thats what i'll do :thumbsup:

 

 

Edit: Ohhh no doubt there will be a ton of pics :smile:

Edited by Lethaface
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Take a look in the vids forum, JT vs. DG or something like that.

I ran JT on his bike (granted it gernaded that run) and my 421 cub on gas with 35PWks...stock tranny (no override) stock clutch....

 

Believe me...it ran just fine. It's a quick 10 or 12 second clip....my bike is the furthest one away....

 

http://www.bansheehq.com/forums/index.php?showtopic=68689

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the PJ is a really old technology carb... they came on the honda dirtbikes in the 80's... the PWK is newer technology...

 

the throttle response on the PWK are much more snappy... and the slides in the PWK are d slides the pjs are called oval or something like that... they look like a big rectangle....

 

also i have asked a few others that ran both and it seemed that myself and everyone else used more fuel on the 34PJ's ....

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