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Norm's 2 stroke repair center Having problems with your 2 stroke engine? Just ask Norm, he loves to tinker and troubleshoot engines

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  #41  
Old 01-03-2010, 02:47 PM
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Norman Norman is offline
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Default Re: different way to mount a tuned pipe

the piston was reversed. I haven't looked at this for quite some time.
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  #42  
Old 01-03-2010, 04:35 PM
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Default Re: different way to mount a tuned pipe

hey Pappy, i stole the idea from Norman and ran with it. you can check out my results here:http://motorbicycling.com/f38/backwa...son-13458.html

i've got a few hundred miles on it so far, and i'm lovin' it this way. if you got any questions, feel free to ask...
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  #43  
Old 01-03-2010, 06:24 PM
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Default Re: different way to mount a tuned pipe

why would the piston need turned also?
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  #44  
Old 01-03-2010, 08:13 PM
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Default Re: different way to mount a tuned pipe

the gap on the rings can hang up on your intake port when you switch it. it might not. but it looked too close for comfort for me, so i reversed it. it's easy enough to do it while the rest of it's apart, so it's no big deal.
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  #45  
Old 02-14-2010, 12:59 PM
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Default Re: first time for this backwards top end

I changed the piston with the cylinder mainly to keep the piston and cylinder wearing the same areas.
I have found these engines with the rings locater pins facing the front of the cylinder and with them facing the back of the cylinder.
If your going to change yours check the cylinder and piston make sure that the ring gap does not go over a port or you stand a very good chance of hanging a ring on a port, it will break the ring making for a very sad day for you.
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  #46  
Old 12-12-2012, 01:29 PM
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Default Re: first time for this backwards top end

That looks more natural .... how many mods need to be made on the ports, is it difficult?
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  #47  
Old 12-12-2012, 02:54 PM
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Default Re: first time for this backwards top end

Just a dremel to blend the ports, a torque wrench for the bolts, some gasket material, and assorted hand tools.
You will also need a modified exhaust pipe, and a modified intake manifold.
You can turn the cylinder around and leave the ports alone just to see if you really want to do the change.
I ran mine backwards for a while then went back to the original set up, I just wanted to say I was the first to do it.
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  #48  
Old 12-13-2012, 12:18 PM
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Default Re: first time for this backwards top end

thanks for talking me through it all those years ago, norman!
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