Due to a recent (yesterday) accident, I need to replace my carb on my 87 LT250R. What are my options. My quads motor is mostly stock except a DG pipe and silencer. Is it best to stay stock or are there other carbs from another quad or different company that would work better. The stock LT250R carbs seem to have a lot of starting trouble. I figured since I need to replace it, maybe a upgrade is an option. Any ideas would be greatly appreciated.

 

Go with a 36 PWK KEIHIN , cost around $175 new. Very good performance and will wake up that motor. Stock is a 34 that is ok but not a High performance carb like the PWK Keihin.

 

I looked at a few of the adds in the Magazines and one had a 39 PWK listed for the LT250R. Any additional info on these carbs would be great. What are the advantages and disadvantages of running either a 34, 36, or 39. Which will be the most reliable and needing the least amount of tuning. Cal thanks for pointing me in the right direction.

 

Trust me on this,,, go with the pwk36. The 34 will be the same as stock. You don't want a 38 or 39 unless you are setting your quad up for TT racing or drag racing. If you did some porting and head work with a really good (Paul turner)or (LRD) pipe then you might want to go to a 38 but if you only have a pipe it would be too much for it. I run a 38pwk air stiker on my quad but it is built to the hilt for TT racing fully ported with all the goodies on it!

 

I replaced my stock carb with a Keihin 34PJ. It was stock carb on a '89 Honda 250r. I got it on ebay for $50. I had to modify the throttle cable a little to make it work since OEM Keihins have a different cable hookup than aftermarket Keihins. I didn't need any more power and didn't want any more gas consumption so I went with the 34mm. It runs much better than the old Mikuni carb and mounts with the stock rubber boots.

 

I just put a PWK 36 on my lt250r. It woke the motor up a lot. Revs alot quicker, runs alot smoother, and pulls harder. I still have my stocker w/ cable and jets if you want it for cheap.

chuck

 

I AGREE GO WITH THE 36. IF YOU DO ALOT OF MOTOR MODS THE BIGGER CARB WORK GREAT. BUT WITH BIGGER ONES YOU RUN INTO BOOT FITTING PROBLEMS. I HAVE A 38 ON MINE WITH A BOYSEEN RADVALVE. THE STOCK AIR BOX IS GOING TO HAVE TO GO THE CARB DOSENT MOUNT UP GOOD AT ALL AND REJETTING ALOT IS A PAIN. I HAVE COME UP WITH A GREAT IDEA FOR THE PROBLEM AND I HAVE THE STUFF ORDERED NOW.

 

What kind of riding do ya do?kehins are ok but the mikuni carb is better,maybe you have to tune your mikuni in for better performance,you riding a zuki not a honda......Zilla

 

I agree with the majority on this one. The PWK 36mm would be the way to go with your set-up. I had a PWK 39 on mt 91 lt250r and it was a pain in the but to put on do to being to big for the boots. I didn't notice much of a fuel usage, but won't reccommend that big of a carb. unless you have the engine polished and ported with a new rad valve cage and other engine mods. The 36 is a nice performance upgrade and I think you'll like the power increase with one.

 

Trust me on this, go for a 38mm PJ Keihen as the minimum. I picked up power everywhere with the 38mm over the stock POS. More low end, alot more midrange and way better top end over rev and way better low end jetting and starting a WIN WIN WIN mod.

The Suzukis like and need more carb than a Honda 250R which does work nicely with a 36. Check out using the same year LT 500 intake manifold as the bigger carbs are very tight, but doable, in the stock boot.

Talk to any Suzuki engine builder and they will advise the same, 38 PJ, 38/39 PWK or 38 TM / TMX. Sudco offer a 38mm TM kit.

Not only was performance way better but the Keihen used noticeably less gas as well.

Kiwi