Keihin CVK quality Japanese 32mm carburetor ?'s By mapbike (Read 3,475 times)

[mapbike]

Thinking of a carb & intake upgrade, would like to have some advice on this item and any personal experience anyone may have with it.
cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&item=280467105125

[jake aka:ventoscoot]

Unless you get their 59mm BB kit as well as the large valve head, it will do nothing for you. That huge carb will alow lots of air and fuel, but your stock head intake only has a 24 or 26mm opening and your cylinder/combustion chamber cannot use it all. Other than that, it looks like a great piece of gear. Scrappydog is great to work with, service and prices are always good.

[mapbike]

Thanks for the input everyone, My question on this was answered.

So I will just focus on getting more air and fuel through the original carb after I modify my exhaust, all the porting and port matching is very farmiliar to me, done it to many small engines like the GX200 Hondas and old Briggs 5HP engines, I have a GX200 that I built a couple of years ago I believe is putting out around 12HP, done a bunch of mods to it, including custom Billet Rod, long slot rockers, chromemolly push rods, High Compression Head, piston, rejetted and tuned carb., custom exhaust, filed flywheel key to give 6 degrees timing advance, Noram racing clutch, and other small tweaks here and there, so I do have some experience in the Modification of small engines, but these GY6 motors are completely new to me and I would much rather learn from you guys who have "been there done that" rather than me just trying a bunch of stuff and having to redo things that you fellows can give me great direction on before I ever turn a wrench on the thing.

I'm not on a quest for more speed above the 60-65mph flat out range, I just want to be able to loose a little less speed on the slight upgrades I travel to and from work, and have it also pull against a head wind a little better, I'm sure this is the quest of most of the people on here that are doing any upgrades to these scooters, I'm not ready to dive into the head, jug, and internal changes yet, I want to get all I can out of what I have to work with in those areas to see if I even really have a need to go any farther with my engine, it seems to me that instead of dumping loads of time and cash into the 150cc one could just upgrade to the 250cc scooter and fill all those gaps and have a little fancier machine at the same time, but I am one that would love to have a 150cc scooter at some point that would almost do what the 250cc will do just for the fun and adventure of getting it to that point.

Well, dang-it I got long winded again, just cant shut up sometime....Thanks you all very much!
Shan

[mflorek]

OK I'm confused (most the time) especially by this Ebay ad. The listing header says 30mm carburetor kit. Later in the product description it says quality Japanese 32mm carburetor ? ? ?

[jake aka:ventoscoot]

I think the 32mm is a typo.