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I just changed plugs to try out a br8eg b/c my brother in law left one in my bag for his rm 250. When, I first got the bike I did a few chops after jetting and the plugs looked good. I heard you can get an overall idea of your jetting by looking at a plug that's been in the bike for a while, so I just cut it down and wanted to get you guys opinion on how it looks. This plug has been in the bike for a few months and has about 300 miles on it. Any feedback is greatly appreciated.

Thanks,

John

These are all the same plug...I just tried to get more that one picture so you guys could see it better

looks like its to rich.

Can't tell much from that plug... a plug chop will tell you what you need to know but if that was only in there 3 months... I would say rich also....

After thinking about it, It's been since november when I did the rb mods. Sorry for the misinformation, it really doesn't seem like it's been that long ago. I will do a few fresh plug chops and see what I come up with. My current jetting is 150, 40, #3 and november thru march it was 152, 40, #4. Any additional thoughts are welcome.

Thanks for the help.

John

That 40 is running it pretty tight...

I have an rb modded stock carb on a 220. Ron sent it back with the 40 in there and a 38 as an alternate pj. Do you think I should go up to a 42?

Thanks,

John

40 is fine when it's hot.... cutting it tight when it starts cooling down. That said... I run a 42 around the clock.

Good call, I always fatten up my jetting when the temp drops below 50 or so (152, 40, #4 CEK). This winter I will take your advise and go 152,42, #4 CEK. Thanks for all the help...I would rather be a little rich than to lean.

Thanks again,

John