49cc 4G T Belt Kit vs. 79cc Monster 90 Bike Engine Kit

darkcobra94

New Member
Nov 23, 2011
13
1
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louisianal
Hello there, I just ordered a bicycle after having my 49cc Chinagirl for quite some time. I have put many, many miles on my 2 stroke. Before the 2 stroke, I had an older 4G T belt kit that I experienced issues with the bearing on the transmission.

With that being said, I am looking at purchasing one of the 2 kits:

49 cc 4G T Belt - $350 (Bicycle-engines.com)

OR

79cc Monster 90 - $269 (Gasbike.net)

I am looking for a bike that I can occasionally ride that will encounter the least amount of issues. With the Grubee 4G T belt, I like how much power the engine has for being smaller than the 79cc engine, but fear the issue with the transmission. Also it is pricier than the 79cc (which is not too big of an issue if it is more reliable)

With the 79cc Monster 90, I fear that over time my bicycle will be destroyed from vibration, but feel like I would have a easier time with other issues, such as transmission. Although the 49cc might be a smoother ride, the power from the 79cc draws me to want to choose it.

In essence, I am looking for a reliable ride that can achieve speeds up to 30-35 MPH smoothly (may be asking for too much). This will be a bicycle I ride around neighborhoods, on the Mississippi River levee (cops never bothered me, I stayed on paths that pedestrians did not frequent (if I did, I pedaled the bike at low speeds to diffuse unwanted attention, etc)

Can I have any recommendations on which kit would work better? I am leaning towards the 79cc kit, but I feel like if the transmission issue with the Grubee 4G has been addressed, then this may be a better option (lighter bike, probably a smoother ride also).

I appreciate any feedback :) I will be looking to order a kit when I make a decision, and since I am needing a hobby, I look forward to some positive feedback!
 

MotoMagz

Well-Known Member
Aug 2, 2010
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Michigan
Well 49cc would be ok with a shift kit. But even then a little head wind the 49cc will struggle.
79cc is way better and once set up should be a smooth ride with no vibration. You could always remove govner for a little more power. 4 strokes don’t shake like 2 strokes. Just make sure your frame will be big enough for engine.
 

darkcobra94

New Member
Nov 23, 2011
13
1
3
louisianal
Well 49cc would be ok with a shift kit. But even then a little head wind the 49cc will struggle.
79cc is way better and once set up should be a smooth ride with no vibration. You could always remove govner for a little more power. 4 strokes don’t shake like 2 strokes. Just make sure your frame will be big enough for engine.

Although looking at the 79cc kit, it does not come with the wide pedal kit, so that's an extra $30-$50. I'm leaning towards the 49cc kit more, I just don't know if they fixed the oilite bushing issue.
 

CrazyDan

Member
Apr 9, 2018
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Yucaipa, CA
Although looking at the 79cc kit, it does not come with the wide pedal kit, so that's an extra $30-$50. I'm leaning towards the 49cc kit more, I just don't know if they fixed the oilite bushing issue.
You can always get the hs142f-1g, it has a tapered shaft and clutch attaches to the shaft, bell is attached to the transfer case. No oilite bushing to mess with.
 
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