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Honda TRX450R Forums: Honda TRX 450R Forum > 450R Performance and Mods. > Engine > Engine Tech FAQ
MPB
OK the R is all of a sudden running like poo. It starts and idles fine, but when I get into the throttle at it surges, sputters and pops. Put in a new plug, and double checked the air fuel screw. Filter is clean. I am at a loss, it ran fine the last time I had it out and now not so much. Has HRC cam, Yosh full TRS, and custom tune buy local shop. Any input is appreciated.
want2bfast
Old fuel?
jp313
QUOTE(MPB @ Aug 9 2009, 09:08 PM) *
OK the R is all of a sudden running like poo. It starts and idles fine, but when I get into the throttle at it surges, sputters and pops. Put in a new plug, and double checked the air fuel screw. Filter is clean. I am at a loss, it ran fine the last time I had it out and now not so much. Has HRC cam, Yosh full TRS, and custom tune buy local shop. Any input is appreciated.

When was the last time you had it out?
MPB
The fuel isn't more the a month old. I have never had any issues with that. I just topped it off right before the last ride.
jp313
QUOTE(MPB @ Aug 9 2009, 10:48 PM) *
The fuel isn't more the a month old. I have never had any issues with that. I just topped it off right before the last ride.

You may think about taking your carb off and check it for trash or water.
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