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  #7951  
Old 04-03-2015, 01:15 PM
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GoreWound GoreWound is offline
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Default Re: what did you do to your motorized bicycle today?

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Originally Posted by mapbike View Post
If that engine was well balaned and ran good, I would for sure break it all the way down and clean the crankcase out well and check to see if the if lower rod bearing feels good and smooth, may not want to build it back up right now, but you could revive the little monster later on when you have some tinkering time.

sorry to see you loose an engine in such a horrible way, have you been able to see what you think may have been the cause?

Thats a heck on a hole in that piston for sure....wow!

Best of luck getting your bike ginning with a new power plant asap.

it's funny the engine was running perfect right up until it died. right now my theory is that the piston was a bad one (possibly crappy casting or something) sadly the chances are that I am going to scrap the two stroke and either buy a new china-girl (probably a better one) or just swap out for a gx35 (that little guy will fit in my frame)
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  #7952  
Old 04-03-2015, 05:29 PM
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mapbike mapbike is offline
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Default Re: what did you do to your motorized bicycle today?

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Originally Posted by GoreWound View Post
it's funny the engine was running perfect right up until it died. right now my theory is that the piston was a bad one (possibly crappy casting or something) sadly the chances are that I am going to scrap the two stroke and either buy a new china-girl (probably a better one) or just swap out for a gx35 (that little guy will fit in my frame)
Well I hate to here you may put that little gal to rest, but I wish you the best in what ever direction you decide to go.

Yep very well could have been a bad piston to begin with, we never know for sure what we're gonna get for sure.
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  #7953  
Old 04-03-2015, 08:40 PM
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Default Re: what did you do to your motorized bicycle today?

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Put my motor on today, and tried out my new clutch and found out how crappy the 2600rpm springs are, so , off came the motor again, and put in a 7000 rpm racing spring
Now it is tomorrow, I just finished putting my motor back on, and it is running just the way I wanted it to. WOW!!! what a difference!!! Not easy to get that spring on!!! but it is worth it. I noticed that my new HD clutch, is a lot heavier, and and takes a lot more to hold it back from kicking out so the red 7000 rpm HP spring works just PERFECT!!!
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  #7954  
Old 04-03-2015, 08:45 PM
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Default Re: what did you do to your motorized bicycle today?

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Now it is tomorrow, I just finished putting my motor back on, and it is running just the way I wanted it to. WOW!!! what a difference!!! Not easy to get that spring on!!! but it is worth it. I noticed that my new HD clutch, is a lot heavier, and and takes a lot more to hold it back from kicking out so the red 7000 rpm HP spring works just PERFECT!!!
Why good!

These bikes will always be a bit frustrating from time to time. And, yes, that's part of their charm. But this 'charm' is kinda underhanded, to my mind.

But, oh, the successes. They really make it worthwhile, don't they?
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  #7955  
Old 04-03-2015, 09:42 PM
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Default Re: what did you do to your motorized bicycle today?

ok am I crazy or are more ppl putting "tiller" motors on bikes I just talked to a guy wanting me to put a 6 horse predator motor on his beach cruiser
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  #7956  
Old 04-03-2015, 09:46 PM
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Blakenstein Blakenstein is offline
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Default Re: what did you do to your motorized bicycle today?

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Originally Posted by bluegoatwoods View Post
Why good!

These bikes will always be a bit frustrating from time to time. And, yes, that's part of their charm. But this 'charm' is kinda underhanded, to my mind.

But, oh, the successes. They really make it worthwhile, don't they?
Yes , and getting that HP spring on, was a lot more than just a " Bit" fustrating, and the knowledge and know how that I gained is priceless!!!
Thanks for your reply Bluegoatwoods.
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  #7957  
Old 04-03-2015, 09:50 PM
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Blakenstein Blakenstein is offline
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Default Re: what did you do to your motorized bicycle today?

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ok am I crazy or are more ppl putting "tiller" motors on bikes I just talked to a guy wanting me to put a 6 horse predator motor on his beach cruiser
I saw a dude here in this forum with a 5 hp Briggs. In the D.I.Y. section.
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  #7958  
Old 04-03-2015, 10:05 PM
curtisfox curtisfox is offline
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Default Re: what did you do to your motorized bicycle today?

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ok am I crazy or are more ppl putting "tiller" motors on bikes I just talked to a guy wanting me to put a 6 horse predator motor on his beach cruiser
There are a lot of guys here on the forum that have done it .............Curt
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  #7959  
Old 04-03-2015, 10:50 PM
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Default Re: what did you do to your motorized bicycle today?

wow I put a 7 horse on a 20" pack in the 70"s and only got it up to 37 thaqt was fast to us but these things are hitting 69 that's scary
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  #7960  
Old 04-05-2015, 01:12 AM
Motor awesomeness Motor awesomeness is offline
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Default Re: what did you do to your motorized bicycle today?

I stuck a water bottle in my bike for the sound effect as I plan to build one over the summer
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