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Modified 72 R5 at sunrise

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Messages - GHtokyo

#1
I wouldn't worry too much about the dripping oil.  Its an indication the engine was misfiring, and unburned gas and oil for pushed out of the exhaust port.  For some reason plugs can get fouled very easily on 2 strokes, probably due to the oil in the mixture.  Were you revving the engine on the choke, or have a dirty air filter?  Or any other reason it would be to rich?  Otherwise, as you did, replace plugs and move on

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#2
Turning Wrenches / Re: Rejetting after expansion chambers
September 18, 2020, 12:44:51 AM
Ok, I'll go with the k&n.  They make reed valve carb holders that have a hole in the bottom for a crossover tube between the carb and the engine.  Just wondering what that does.   Mine are starting to crack, so...

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#3
Turning Wrenches / Re: Rejetting after expansion chambers
September 17, 2020, 10:27:10 PM
Sorry, was gonna say, yes it's crap with even the larger, off-center pods.  Looking to add a y boot next.  How important is the crossover tube after the carb?

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#4
Turning Wrenches / Re: Rejetting after expansion chambers
September 17, 2020, 10:23:21 PM
Yes, I actually think it is running rich on the 130 which also shows how poor the flat bac
.  Its even the larger  pod filtersod

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#5
Turning Wrenches / Rejetting after expansion chambers
September 17, 2020, 03:52:42 PM
I have a 1973 RD 350 engine.  Working on adding Power Pipes by J&R expansion chamber exhaust pipes.  What size main jet should I start with for tuning?
I have the stock 130 main now with pod air filters.
No other mods....yet.


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