Hey Everyone!

I'm new to this hobby and totaly hooked! Finished my first build and quickly bought 5 more motors. LOL Now I have 2 Point Beach Cruisers and building a chopper from a Moon Dog frame.
I'll post some pics soon, I already found a old kid carry cart at the dump, stripped it down and painted it to match the Cruiser! Went to the auto parts and got some blue noen bars for the sides and a red one in the back running of a 12 vlt cycle batt. What a head turner when I go for a night ride!

I have a couple of questions, I have the chineese motors both 49cc and 80, the 49cc is fast and has no real issues. The 80 cc starts of fast then bogs down, then you let off throtle and hit it again and it picks up then bogs down.

Since I have motoers here i tried just switching the carbs, but still have that bogging. Tops out in the high 20's when its not acting up. Should be faster, because the 49 will keep right up and pass the 80. What else can I try?

Also are the carbs the same on the 49 and 80?
What about the throtle attachment and needle,are they interchangable?

One other thing that bugs me is the clutch gears are bone dry? I'm just learning and they may not need it but sure look like they are thirsty?

Thanks Ruggs

Welcome to the forum. 6 motors, wow!

The carbs are the same on the 49cc vs the 70cc (it's not really 80cc like they claim). Basically the carb and exhaust are perfect for the 49cc, but kind of a hindrance on the 70cc.

As for the clutch, a drop of very sticky grease is all that's required for the gears.

ahh, ok
so do I need a different carb and muffler for better performance? on the 70's?

I can't seem to the idle to purr like the 49 either?

Thanks for the speedy reply, I think I'm going to like this place!

welcome to the site. i will let one of the better mechanics answer why it is bogging down. one thing though is do not expect the 80cc motor to be quicker then the 49cc. the difference in the motors and the way they were designed is the larger motor was designed to be a work horse. designed for towing a load or some of us bigger guys lol. most likely you will not get more speed from the bigger motor. i hope this answers a little bit of your question. glad to have you with us

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OK, so it has more power but not much more top end speed, but she's still not running right? After it picks up some speed it bogs way down. The muffler had a ;ot of flak and a good size bump of weld blocking flow, maybe? Going to try it again now.

I'll be back

Nope

still doin it!

when it bogs down, does the motor sound like a huge load was just put on it, or does it just stop making power but sound like it's revving normally?

Try swapping your CDI, spark plug, and wire over from the 49cc and see if it helps any.

I had the same problem when I owned my 70cc. I remember Dean taking off the throttle cable and lowering the clip on the barrel to the middle slot. After that my motor ran great. I also installed an expansion chamber and modified my exhaust tube as well.

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Link to the Pipelyne tuned pipes
http://motorbicycling.com/f23/new-sc...-sale-189.html

The 49cc can breathe OK with the supplied components, but the 67cc will choke or just won't put out the power. Open up the manifolds, seal it up, put a tuned pipe on, get a new plug and wire and you will feel the 67cc is worth it.

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OK, were swapping the CDI out of a new box to try that, it bogs in the low 20's now, runs fine till that point
I think we tried every ajustment on the needle its on the 2nd from bottom now.

were do you get a new wire? and the right stuff to make it sweet? How do I open up manifolds?