Greetings from the Granite State

[sc00ter]

I would suggest Zuma Forums but the site is dead, especially in the 50cc section. Zumas R Us have been around for a long time, and you should email them and ask for suggestions on the roller weights in regards to you tune and body weight. They should be able to point you in the right direction. It sounds like your transmission tune is way off, and it needs to be dialed in. I hate tuning transmissions and bug a friend at work for help when needed. One day I will get around to doing my 98 Zuma. I have a Malossi cast 70cc, free flow intake, 17.5 Stage 6 carb, carbon reed pedals, Malossi Wild Lion exhaust, Multivar 2000 variator, NCY secondary sheave (my OEM is damaged) and all related jets, rollers and springs. I despise pod filters but did order a clear OEM style air box. Just lazy and have yet to get around to mess with it. Using a Lamda exhaust reader along with plug seat temp and air/fuel readings to tune. Hate soft seizes from poor jetting and flat spots from bad transmission tuning. I just sold a 2001 Zuma for $400. Hit 45mph solid. Has a Leo Vince ZX-R exhaust, Multivar 2000 variator, free flow intake, carbon reeds, up jetted on stock carb, white torque spring and some minor port work done.

[wheelbender6]

"I came across a deal on a 2002 Zuma"

Ahhh. A hot little 2 stroke. Well done. Welcome to the forum.

[Zappa]

Originally Posted by sc00ter

I would suggest Zuma Forums but the site is dead, especially in the 50cc section. Zumas R Us have been around for a long time, and you should email them and ask for suggestions on the roller weights in regards to you tune and body weight. They should be able to point you in the right direction. It sounds like your transmission tune is way off, and it needs to be dialed in. I hate tuning transmissions and bug a friend at work for help when needed. One day I will get around to doing my 98 Zuma. I have a Malossi cast 70cc, free flow intake, 17.5 Stage 6 carb, carbon reed pedals, Malossi Wild Lion exhaust, Multivar 2000 variator, NCY secondary sheave (my OEM is damaged) and all related jets, rollers and springs. I despise pod filters but did order a clear OEM style air box. Just lazy and have yet to get around to mess with it. Using a Lamda exhaust reader along with plug seat temp and air/fuel readings to tune. Hate soft seizes from poor jetting and flat spots from bad transmission tuning. I just sold a 2001 Zuma for $400. Hit 45mph solid. Has a Leo Vince ZX-R exhaust, Multivar 2000 variator, free flow intake, carbon reeds, up jetted on stock carb, white torque spring and some minor port work done.

Hi sc00ter, thanks for the reply.
The power loss wasn't from the transmission kit, it was caused by reusing the stock airbox, the engine couldn't breath. The new K&N filter cured that, but I ran into another problem which I posted about here:

http://www.scootdawg.net/showthread.php?t=56191

[sc00ter]

Watch you plug color! Do plug chops on the regular till you dial it in! Every big bore Zuma we build (friend and I love these things) we get a minimum 55mph with the stock airbox. Well, we run a gear up in the reduction box also-15/50 ratio. Anyways, my friend runs a rear facing pod filter and he had the worst time getting the jetting correct. Then, we got caught in the rain so he has the rain approved slip on cover over it now. They also make a over-sized factory direct replacement airbox. Oversea's and Mexico get the 100cc 2 stroke bug-eye Zumas, thats one of the only performance related things that directly transfer over, the airbox. I did a Stage 1 build on my pre-bug. Hit 45mph but didnt like the exhaust. If you get a expansion chamber type exhaust, the Yasuni R is a great value-both with a 50cc and 70cc. The "Z" series sucks. I bought a Z series...... Had a R series Yasuni on my old 70cc 2008 bug-eye Zuma. Worked great and not to loud either.