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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Risks of running on rich side :) ? /cgi-bin/YaBB.pl?num=1397485448 Message started by Henrik on 04/14/14 at 07:24:07 |
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Title: Risks of running on rich side :) ? Post by Henrik on 04/14/14 at 07:24:07 Heres the thing, i have jetted my carb 155/50 and made the white spacer modification (2 shims). My bike has K&N open airfilter and i have changed the stock muffler with a short pipe that is rather open. It runs great but when looking at what is recomended it seems that i maybe running the bike a litle to rich. Did the test with fuel/air mixture screw and I could turn it all the way in whitout the bike dying on idle. Now i run it 1,5 half turns out (highest idle setting) and it feels good. Not so much backfiring as i had before. What are the risks of running the bike to rich over time? |
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Title: Re: Risks of running on rich side :) ? Post by Dave on 04/14/14 at 07:28:56 Fouled plug, carboned up piston and valves, loose carbon gettng stuck under a valve, premature ring and cylinder wear from excess fuel washing oil off cylinder walls, carbon stuck rings in piston, carbon scoring piston skirt and cylinder walls.....just depends how overly rich it is. |
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Title: Re: Risks of running on rich side :) ? Post by Henrik on 04/14/14 at 07:53:53 How could i best determine if it is to rich? It feels and sonds good. |
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Title: Re: Risks of running on rich side :) ? Post by Dave on 04/14/14 at 08:32:17 5479726E75774E1C0 wrote:
http://www.zrxoa.org/webpages/techinfo/carb/carbtuning.html |
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Title: Re: Risks of running on rich side :) ? Post by pgambr on 04/14/14 at 09:31:03 4B707D6A7B776C6A7179746B180 wrote:
Interesting, how about too lean. Thanks Dave! |
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Title: Re: Risks of running on rich side :) ? Post by Dave on 04/14/14 at 09:56:18 Too lean: Mildly lean: Poor acceleraration, hunting/surging and won't hold a steady speed at a steady throttle setting, backfire through carb or pop/bang out the exhaust, stalls when throttle is closed. Really lean: Burned exhaust valves, spark plug electode burned away, burned hole in piston. |
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Title: Re: Risks of running on rich side :) ? Post by WD on 04/14/14 at 09:58:00 1106000C0313610 wrote:
Interesting, how about too lean. Thanks Dave![/quote] Burnt valve/s, holed piston, shattered sparkplug, shattered piston, cracked head, cracked cylinder... all kinds of "fun" issues can pop up. I ran my 98 with 155/55 jetting for a few years. 36mpg and smoked like an old tractor trailer. On the very rare occasion that I got an after fire, it would shoot several feet of flames out the tail pipe... And even at that rich a setting, the exhaust valves look cooked/ceramic coated... It is now jetted as small as you can go from a Lancer kit. Once back on the road, I expect it to need 152.5/52.5 courtesy of the pipe and modified air box. |
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Title: Re: Risks of running on rich side :) ? Post by pgambr on 04/14/14 at 10:18:14 Thanks WD. I am at a comparable elevation and I have the standard jets in now. Runs great with the Dyna and KN drop in. Please let me know how yours runs once you get it set-up. When I get time I'm going to adjust the valves, put on Versy's cam chain tensioner and maybe rejet. Hey, I saw your bike on craigslist. ;D |
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Title: Re: Risks of running on rich side :) ? Post by S-P on 04/14/14 at 16:52:08 5740464A4555270 wrote:
I just changed to a Dyna and cone filter. I re-jetted with Lancer's kit to 2 washers, 52.5 and 152.5. I'm in Phoenix so about 1200 feet maybe. The bike runs GREAT, huge difference from stock. I still get a little POOT when I shut it down about 75% of the time. When it is stone cold I'll get a very small pop between gear shifts but that goes away as soon as it warms up. I'm probably getting about 50 mpg around town and I don't ride HARD, but I do like to goose it once in a while. |
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Title: Re: Risks of running on rich side :) ? Post by arteacher on 04/14/14 at 17:58:14 I am surprised no-one has suggested looking at the plug to see if it is too rich. |
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Title: Re: Risks of running on rich side :) ? Post by Dave on 04/14/14 at 18:27:26 656E6E676B64657F7E0A0 wrote:
Up to now nobody ask how you investigate......only what happens "IF". |
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Title: Re: Risks of running on rich side :) ? Post by Serowbot on 04/14/14 at 18:52:31 ... and I always heard,... you can never be too rich, or too young... :-?... |
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Title: Re: Risks of running on rich side :) ? Post by Steve H on 04/14/14 at 19:55:05 3E283F223A2F22394D0 wrote:
Guess I'm out on both counts |
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Title: Re: Risks of running on rich side :) ? Post by WD on 04/15/14 at 00:12:50 6275737F7060120 wrote:
I would expect you did... still need to do a front tire to front tire comparison photo of the 98 and the 03... Hard to believe they are the same platform these days... I "think" Pine said the 03 has new brakes, but, can't prove it by me, they suck... I did manage to wear more whiskers off the sidewall shoulder already. And the tires are leaving black trails of dust on the sidewalk at work. I think I ride it a bit harder than it is used to. ;D And the windshield lasted 4 days. I broke it... in my defense, it was already cracked and age crazed (came off the VN800A I owned a few years ago)... still sucks, need to order a replacement plastic. Memphis Shades stuff is not inexpensive... >:( No other bike damage, wet grass, slippers and an RV bumper in a thunderstorm make for a lousy combination)... :-[ |
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