OzVMX Forum
Clubroom => Bike Talk => Topic started by: dodgee on January 06, 2013, 11:37:13 am
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chasing a article on fitting a gem reed to a 73 cr250 honda.
have been told there is one around.
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I used one dodgee on my '74 250, you need to cut 2 windows on the intake side of the piston. It makes a big difference, I may have an article somewhere.
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thanks john, remember what size carby you used
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38 mikuni carb
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Mugen made a piston, but they are rare.
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i put a gem on my tm 125 back in 75 or 76 it came with instructions on where to drill the holes in the piston wish i still had that bike and the instructions
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Before you do ANY piston mods, take the time to get in contact with Lozza!
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Before you do ANY piston mods, take the time to get in contact with Lozza!
Why?? What's his claim to fame?
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Take the time to talk with him... ;)
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now we had this discussion before didn't we - nothing Mugen for the 73/74 Hondas?
And yes - the GEM reed setup and properly modified pistons make a big difference to the performance.
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chasing a article on fitting a gem reed to a 73 cr250 honda.
have been told there is one around.
To make the most of the reed , boyensen tunnels and a C/boost port needs to be cut in.
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put a early yz piston in it you will have to move the ring locator. you will have to put a extra port in the cylinder if you want it to work properly
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with the YZ Piston there was a slight change to the deck height as well
worked good in the air cooled ATC250R as well