Interesting...

Never heard of a mitsubishi 49cc two stroke... Until very recently, the largest one they made was the TLE43 (43cc.) They just came out with the TLE48 (a 48 cc motor.)

Nor, does the mitsubishi carb even HAVE a mixture screw. There's only an idle adjust screw.

If it's a genuine mitsubishi, it will have a 'two-barrel' carb. One of the 'barrels' is used to send air (only) to the cylinder for a short time, to reduce emissions.

If it's a true mitsubishi, you should be running at 50:1 on the premix.

Every single person has told me exactly that. But this is the EXACT motor
Code:
http://thescooterguy.org/cgi-bin/i/images/motors_001.jpg
Tell me, if Jerry is wrong, what kind of motor is that?

My carb has idle adjust, and mixture adjust... the guy i bought it from (not Jerry) said run it at 30:1
 
monsterscooterparts.com is what jerry meant...

I got the head back on, but also broke the gasket. the bike is dead to me. I am going to have one of my machinist friends make me a sprocket, then sell this thing. it's too slow for me :D
 
I actually looked at it after i posted that and found the problem.
Instead of like 12 washers to space the upper part of the aluminum piece (name is leaving me atm), I used a spacer from Ace Hardware. The spacer is hardened steel. I guess I tightened my top bolt a little too tight and the sprocket wasn't lined up correctly. OOPS! At least I didn't get hurt!

I will probably order a new aluminum piece from you, as well as a sprocket for more speed (the bike it is in climbs any hills with a 10t no problem. even 112th on mt scott)
 
i have two 8 t left . lots of 11t and some 14 t . that's too tall for your motor . but bring it buy i will hook you up with free sprocket . show you how to keep it running smooth . to line the sprockets up take the chain off and use a straight edge then putt the chain on . with pedals i would say then pedal it without the motor power and see if everything runs quietly over the gear no chatter . then you got it . but with the foot pegs the straight edge will have to do . use the top adjuster bolts to adjust the toe and heal of the sprocket . u should have the bolt configuration looking like this
http://s480.photobucket.com/albums/rr161/thescooterguy/?action=view&current=newbikepic001.jpg i would like to see the bike . see how it is doing give it a tune up for you . you might be surprised,
 
yes . the mitsubishi is from china also isnt it . this was from monster.com

No. The Mitsubishi is from Japan, and they have very good quality control in their manufacturing. The chinese 'clones' are not of the current design. They're knock-offs of a 20 year old design (at least) of the of the old Mitsubishi TL series engines. Engine quality is unknown (a given motor might be fine, or it might be a lemon. Only the end user knows for sure.)

The true Mitsubishi's TLE series engines (the new ones) use an interesting design to greatly reduce emissions. They have a 'split' carb, with two 'barrels.' One of the barrels is a straight-through pipe from the air filter; the second one is jetted and supplies the fuel-air mix. At the very beginning of the fuel intake, ONLY air is supplied. A little later in the cycle, fuel-air mix from the second 'barrel' is added. Since it is added later in the cycle, it doesn't have time to go straight-through the cylinder and get exhausted before it's burnt. With the older designs, as much as 25-30% of the fuel gets exhausted, unburnt, out the exhaust pipe.

Ref the first post in this thread for a link to a Mitsubishi white paper that discusses the TLE design. Also, this thread discusses it in some detail. There's a photo of the genuine Mitsubishi 'two-barrel' carb, for instance.
 
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