Clinician
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Joined: Jun 30, 2023 16:29:27 GMT -6
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Post by brutus413 on Jun 30, 2023 16:47:39 GMT -6
not sure if we're allowed to post links, but here's the roketa store website partsroketa.com/ |
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Clinician
Currently Offline
Posts: 3
Likes: 0
Joined: Jun 30, 2023 16:29:27 GMT -6
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63mm BBK
by: brutus413 - Jun 30, 2023 16:42:06 GMT -6
Post by brutus413 on Jun 30, 2023 16:42:06 GMT -6
I was able to find a 63mm BBK that didn't need the crankcase bored out and dropped it into my 157QMJ. The second part of the puzzle for me was final gear ratio. With the added HP I upped the final gear ratio by 30% and was able to get up to 70mph on the flat. Ran for about 750mi (1250Km) before the crank went bad. That was 15 months ago and I just haven't had time to get into it. Finally took it to a mechanic and they want to replace the motor. Not sure that's necessary, but the lack of free time is making it a tempting option.
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Clinician
Currently Offline
Posts: 3
Likes: 0
Joined: Jun 30, 2023 16:29:27 GMT -6
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GY6 180cc
by: brutus413 - Jun 30, 2023 16:35:50 GMT -6
Post by brutus413 on Jun 30, 2023 16:35:50 GMT -6
Not sure if it helps, but my 63mm bbk went 750mi before the crank went bad. That was 15 months ago and I just haven't had the time to get into it. Finally took it to a mechanic and they want to replace the entire engine. I second the high torque starter option, but I never had an issue with the stock starter until the crank started binding up.
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