39 PWK vs: Stk 34 PJ Perfomence

[ERBE]

Quad is stock, witha FMF Fatty and a some compression, how much bottom end loss? throttle responce?? better to stay stock , or tapor bore to 36

[wilkin250r]

Lots of people like to use 38mm carbs on stock bore, but that's usually on a ported engine.

With the stock porting, I would say you really can't take advantage of anything over about 36mm. So a big-ol' 39mm will give you worse throttle response and low-end, without any advantage in the upper end.

Unless you get a smoking deal, I would say that money could be better spent elsewhere, and a good-quality port job would be my first suggestion.

[86250rrider]

38 mm a/s is a carb you can use now...but when its ported it will rip!unfortunately.....you will get used to it :mad:

[criminalpoet]

Well, without porting it doesnt do any good to jump up to a larger carb. Being that you already have an aftermarket pipe I would say the next best bang for your buck would be a 1 Dir Racing G-3 reed valve. You will definitely notice a seat of your pants difference in power with this.

[fiveOnick]

A 35 AS would work good, couple that with some TDR or Carbon tech reeds and port out the stock cage or the best VF. Dont waist money on a G3 setup. Your on LT500hq aren't you, if so you should know plenty about which reeds are the best right?

A 38as might be ok depending on the pipe, a LRD would still be pretty smooth. Say a ESR 5 though would be real pipey and kinda difficult to ride. No point if you dont plan on porting later though.

[ERBE]

Dang am I getting rep or what, I might occasionally cause a ruckus on 250/500HQ

[fiveOnick]

Originally posted by ERBE
Dang am I getting rep or what, I might occasionally cause a ruckus on 250/500HQ

Nah, your SN sticks out. Most people dont use all caps.

[86 Quad R]

first off. what type of riding do ya do mostly? i'd size my carb around that.

[ERBE]

GLAMIS!!!!!!!!

[86 Quad R]

unless your getting a smokin deal on the carb i wouldnt put in on there right now.

i would wait and set the engine up for the dunes. ie porting, pipe, reed cage, carb ect ect. putting a 39 on your quad now will kill the bottom end.

[ERBE]

I just have an Extra 38 PJ Taper bored and also a 39 PWK tapor bored 41.5 mm from my LT500, got a 38 mod'd to a 42and stated looking for a 48 lectron, I been told a good Taper bored 34 PJ to a 36 runs damn good also on the 4 trax

[86 Quad R]

as long as the tapper bore is done correctly it will be fine. if not, they run like crap. especially being a pj. they are tuff to tune to start with.

[ERBE]

PJ is great, had more torrets with the PWK