Has anyone here successfully tuned the TM 36-68 on their bike wothout the big bore kit. I finished fitting the carb on my bike, and am in the tuning process. I am currently running the 12.5 pilot, stock neddle, P-6 needle jet and 125 main.

 

Hey, Jim,
How does your bike run so far? It would seem that the 36 might be a bit large, cutting down on some of your low and mid range performance, but you get to be the judge. My bike has the 331 and I have run both the TM33 8012 carb, bored to 34mm by Bill Blue and the Keihin 35MM FCR. Both work very well overall. Let us know how your bike works with the bigger mixer.

Bill Dragoo
Norman, Oklahoma

 

Although I have a big bore, I think that tuning the TM36 is a tricky thing to get just right and will take plenty of trial and error. I haven't gotten mine tuned quite right yet, but have a variety of jets/needles to get it there. (Just need to find a free weekend day to do it).

The midrange is especially tricky. I'm guessing that the 36 might be too much carb for the stock displacement too. Unless someone else has done this and has a starting recipe to share, you may be the first to try this.

Mustang has a starting point for a big bore (his is 340cc) which he reports is working well for him:

#130 MJ
#17.5 PJ
9EBY1-50 needle - middle clip
P4 needle jet

My su****ion is that going away from the stock needle jet and needle is the key. Another needle, the 9EBY1-51 is leaner than the -50. Maybe the P4 and -51 needle might be the ticket?

 

I think you'll get there if you play with it enough. I have heard more than one person say that the right needle is the trick to getting it completely dialed-in. One thing I think is that you probably need better than stock airflow with that size of carb, so if you don't have at least a slip on and larger airbox opening, you might want to consider that first.

I ran with a pumper and stock displacement for one season. You will get a very noticeable increase in response, but it's nothing comparedto apumper combined with300cc and above...the extra shot of fuel combined with the added torque is a match made in heaven. Lookingat my Crystal ball, I see a big bore kit in your future.

 

Well I have all the usual hop up mods:removed backfire screen, twin air brand filter, smog crap removed,2 bros slip on, and KDX snorkel. So far I've only played with the fuel screw and AP timing. It idles quite nice, although seems to have a longer warm up time than the CVK. I've only had a limited section of road to ride on today, but the mid range felt very good with no backfiring, surging , etc. Hopefully tommorrow I can go for a full ride to test it further. I'll keep you all posted.