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TOPIC: Re:Changing jetting, changing sound Forum Tools Post New Topic Show latest posts Rules

#287985 Greeny (User) Expert Boarder Posts: 502 Changing jetting, changing sound 1 Year, 11 Months ago   OK....hopefully not a stupid question. Will changing the jetting cause the bike to sound different? I leaned mine out quite a bit over the weekend. The exhaust sounds the same, but now the motor is a lot noisier. It almost sounds like something is loose. Pretty sure I buttoned up everything just fine, plus it's running just fine. I can hear the noise a little on a slight decel, but mainly when it's idling. Just making a lot more noise now that it's lean compared to when it was rich. Does that make any sense at all to you carb gurus? Thanks....greeny   Logged     The administrator has disabled public write access. #287990 davej (User) Platinum Boarder Posts: 4198 Re:Changing jetting, changing sound 1 Year, 11 Months ago   Depending on how lean you went it will run hotter. That could cause thinning of oil and louder engine noise. Just a thought.   Logged     dave   The administrator has disabled public write access. #287992 Greeny (User) Expert Boarder Posts: 502 Re:Changing jetting, changing sound 1 Year, 11 Months ago   I dropped my main from stock to a DJ175. The clip is on the 4th groove thinking that would richen it a bit since I was using the leaner main. I didn't have a DJ180 to use. I also changed the oil a couple days before that, but used the exact same kind of oil/filter as I took out. The bike sat in the sun all day today and I first noticed the sound this afternoon right after starting it. I initially thought something was loose on the bike. Is there a method to check if you're running too lean? Thanks Dave....greeny   Logged     The administrator has disabled public write access. #287995 davej (User) Platinum Boarder Posts: 4198 Re:Changing jetting, changing sound 1 Year, 11 Months ago   Look in the tech articles in the jetting section and do a WOT test. Actually reading the articles on jetting will give you a pretty good understanding of how to properly jet your bike and how the carb works.   Logged     dave   The administrator has disabled public write access. #287997 Road_Hawg (User) Platinum Boarder Posts: 1397 Re:Changing jetting, changing sound 1 Year, 11 Months ago   Greeny wrote: Is there a method to check if you're running too lean? Thanks Dave....greeny Pull your plugs. Black=too rich. White=too lean. Tan/dark tan=good   Logged       The administrator has disabled public write access. #288019 Greeny (User) Expert Boarder Posts: 502 Re:Changing jetting, changing sound 1 Year, 11 Months ago   How fast will your plugs color according to a rich/lean condition? I just put in new ones a week ago is why I ask. Thanks RH....greeny   Logged     The administrator has disabled public write access. #288020 Greeny (User) Expert Boarder Posts: 502 Re:Changing jetting, changing sound 1 Year, 11 Months ago   Thanks Dave....I'll try the WOT. And trust me....I've read/reread all that preparing me for this moment. There's some very good stuff out there on jetting. Thanks....greeny   Logged     The administrator has disabled public write access.

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