Author Topic: carb sugguestions (Read 6128 times)

taft372 · « **on:** November 05, 2013, 04:37:04 PM »

Hi everyone!
I have a esr 370 and am running a 40.5 pwk.
But I want to go bigger, this bike mainly a hillshooter, but I'm also not sold on the lectrons either. Any other options?

udontknowme · « **Reply #1 on:** November 05, 2013, 09:51:55 PM »

might want to consider alky. switched mine this summer and no way ill go back to gas. get the right head and you should be good

taft372 · « **Reply #2 on:** November 05, 2013, 10:09:13 PM »

Isnt alky a pain to deal with though? Having to redo the carb, fuel pump and purge?

udontknowme · « **Reply #3 on:** November 05, 2013, 10:26:49 PM »

well it can be a pain at first but it aint bad. purging only takes a few minutes at the end of the day. maybe you can go 2days but i always did it every day i rode. if you get a lectron from packard it will be already set up. you just gotta tune it. if you got a big guzzler maybe you dont need a pump but i cant say for certain. if you want a pump its pretty easy to install.

taft372 · « **Reply #4 on:** November 05, 2013, 11:19:16 PM »

I'm already running a pingel petcock. And I have a fuel pump laying around. What size lectron would you suggest?

Morse250r · « **Reply #5 on:** November 06, 2013, 02:53:54 AM »

44-48. Depends on what you mostly do for riding style. Yes once you have a routine down for purging it's really quite simple and fast. I'll go two or three days max without purging Lectrons are a very nice carb. Call Packard and he can tell you if a gravity fed one will work for you.

taft372 · « **Reply #6 on:** November 06, 2013, 10:29:22 AM »

What about reliablity issues with alcohol? A. Its about 80% hillshooter 20% duner. Mostly because I have to dune to the hills.

Morse250r · « **Reply #7 on:** November 06, 2013, 12:34:37 PM »

Alky is alittle more forgiving you can run it on the fat side and still usually have more power then with a well tuned gas motor. The key is to purge if it goes ignored then damage to the crank bearings and cyl occour

taft372 · « **Reply #8 on:** November 06, 2013, 01:17:42 PM »

What about the fcr or hsr carbs? Anyone run those on an R? I'm just not that sold on alcohol for my application.

rsss396 · « **Reply #9 on:** November 06, 2013, 02:24:36 PM »

IMO hillshooters should probably not run alcohol, since they are on and off the throttle at least once, not sure how the old round slide mikuni's are for on off throttle response but some snowmobile drag racers still run those big bodied carbs and they are available in the bigger sizes.

Otherwise maybe you need to just stick with the 40.5 and work on pipe, cylinder head and ignition curve to make more HP you need more than just peak power to be fast racing a hill

taft372 · « **Reply #10 on:** November 06, 2013, 03:01:05 PM »

Isn't a 40.5 under carbed for a 370?

udontknowme · « **Reply #11 on:** November 07, 2013, 02:52:32 AM »

1st rule of drag racing= dont let off :glee:

Jerry Hall · « **Reply #12 on:** November 07, 2013, 10:06:01 AM »

I do not recommend alcohol for recreational, dune or woods riding. The majority of the alcohol carbs have not had all of the circuits and needles developed so that the carburetor meters accurately enough in the 0 to 3/4 throttle settings to be reliable.

taft372 · « **Reply #13 on:** November 07, 2013, 11:19:19 AM »

I'm not going to run alcohol, but is a 40.5 pwk on the small side for a 370?

Rupp250 · « **Reply #14 on:** November 07, 2013, 02:07:06 PM »

I run a 44mm Lectron on my 363 Sphinx. I'd say 50/50 dune/hill shoot. This is on 110. I ride at Pismo mostly and didn't want to have to ride back to camp all the time to refill with Alky. Seems to work just fine for me. I saw a 2hp increase and still pretty much the same hp/tq graph as with the 40.5 Keihin.