Are these cheap small engines any good long distance riding? How far do you ride yours?

BSAmase

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Sep 27, 2018
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Im wanting to ride my BSA about 32 kilometres to work as long as I have a big enough gas tank, so far it performs really well (around my small country town) doesnt miss a beat.
Also after the last speed test it topped out at 44.5 kilometres an hour is that pretty normal as I thought it might of bin able to go faster then that, Its a standard "80"cc I was told when I Purchased second hand next bike builds getting a 125cc I think.
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BSAmase

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Sep 27, 2018
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Ive just been doing more research on the google and it seems people do bigger ks than I thought sorry if thats a all to often asked question peoples
 

Greg58

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May 1, 2011
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Your speed is a little below what most people get from a 66cc engine, 80cc is marketing and not the actual engine displacement. If you are mechanically inclined you can do a few upgrades to improve speed. Read through the performance upgrade posts here, do one upgrade at a time to see if it works or not. A lot of people do several changes that makes it hard to find which went wrong.
 
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Greg58

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Your straight plug head is probably a lower compression style which was the standard a few years ago, I would check the compression to see what it has. I would also get a good air cleaner to keep dirt and debris out of the carb.
 
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MotorBicycleRacing

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Your speed is a little below what most people get from a 66cc engine, 80cc is marketing and not the actual engine displacement..
That is a 48cc round cylinder motor.
6mm head studs and flat bottomed transfers on the case.
40 mm piston and a small combustion chamber.
I have one of those motors.

Anyone with experience with these motors would know at a glance that
no 66cc looks like that.

I love that gas tank on that cool bike frame.
 
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BSAmase

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Sep 27, 2018
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That is a 48cc round cylinder motor.
6mm head studs and flat bottomed transfers on the case.
40 mm piston and a small combustion chamber.
I have one of those motors.

Anyone with experience with these motors would know at a glance that
no 66cc looks like that.

I love that gas tank on that cool bike frame.
Thanks mate well shame in a way its not higher in cc but as its only the first bike build ill go all out next time good fun though
 

Greg58

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I never looked at the head nuts, the older I get the smaller the pictures look. I have a basic 48cc that does 31, it has a milled head, a trimmed piston skirt and a modified stock exhaust. This is with a 48 tooth rear sprocket.
 

BSAmase

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Sep 27, 2018
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I never looked at the head nuts, the older I get the smaller the pictures look. I have a basic 48cc that does 31, it has a milled head, a trimmed piston skirt and a modified stock exhaust. This is with a 48 tooth rear sprocket.
When you say yours does 31 is that in mph or kph mate
 

BSAmase

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Sep 27, 2018
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So there really pushing to get to 50 kph for this cc mine must be about right mate