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/cgi-bin/YaBB.pl General Category >> Rubber Side Down! >> Post White spacer mod... questions /cgi-bin/YaBB.pl?num=1212156863 Message started by jomiyo on 05/30/08 at 07:14:23 |
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Title: Post White spacer mod... questions Post by jomiyo on 05/30/08 at 07:14:23 I just did the spacer mod and i am still getting a backfire. is it possible that it is backfiring because i took to much away? i didn't put in another washer, just took the stupid white one out. |
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Title: Re: Post White spacer mod... questions Post by verslagen1 on 05/30/08 at 08:01:28 When is it backfiring? Idle? White spacer mod is for mid range throttle response. Backfire occurs at lean throttle conditions. If backfire occurs at idle, adjust idle circuit. Not mid range. |
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Title: Re: Post White spacer mod... questions Post by vtail on 05/30/08 at 08:25:20 Agree with Verslagen. Pop the idle plug and adjust. Might also put in a 150 when stock or 152 with filter and muffler mod. And yes leave the stupid white spacer off ;) |
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Title: Re: Post White spacer mod... questions Post by jomiyo on 05/30/08 at 08:27:41 it pops when i roll off the throttle, but it doesn't pop in between shifting gears anymore. |
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Title: Re: Post White spacer mod... questions Post by verslagen1 on 05/30/08 at 08:34:05 pop on shut down? looking more and more like idle circuit adjustment. |
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Title: Re: Post White spacer mod... questions Post by jomiyo on 05/30/08 at 08:58:18 i haven't shut it down enough times to tell i just did the mod last night. i have a jardine w/ stock air. how would i go about adjusting the idle circuit? |
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Title: Re: Post White spacer mod... questions Post by verslagen1 on 05/30/08 at 09:36:21 On right side of bike, upper right of carb, you either have a brass plug or a pocket with a slotted screw in it. For full instructions, see the tech sect. Lancers straight and simple tuning. But, turn the screw CCW about a 1/8 turn at a time till pop goes away. The more unsure you are the more you should try out your adjustment. |
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Title: Re: Post White spacer mod... questions Post by jomiyo on 05/30/08 at 09:50:26 i thought that was the screw, but i wasn't sure, because last night when i was trying to adjust it.... it didn't seem like it was doing anything. |
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Title: Re: Post White spacer mod... questions Post by machz54 on 05/30/08 at 14:36:11 Was just going to post same question ,removed white spacer and put in 2 small washers should be less than 1/3 spacer..changed mains to 155 from 145..adjusted idle circuit as per instructions''out approx.3 1/4 turns checked exhaust for leaks after tightening all clamps and bolts ,still pops quite loud when I back off throttle and use engine as brake... its a 2007 with 4500km on it any suggestions..Dave PS is 155 main good for harley style muffler thinking of sticking one on for fun... |
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Title: Re: Post White spacer mod... questions Post by toro on 05/30/08 at 15:55:29 That would be my question as well, I just picked up a pair of sportster mufflers, for my '08. Trying to figure out which kit (if any) would be best, or if I should just get some different individual jets from mikuni... |
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Title: Re: Post White spacer mod... questions Post by rigidchop on 05/30/08 at 20:23:02 if you can't tell the difference when you adjust the idle circuit, your probably idling too high already, turn down the idle speed, then adjust the idle circuit. idle speed adj is on the opposite side, large screw. |
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Title: Re: Post White spacer mod... questions Post by Sandy Koocanusa on 05/30/08 at 20:35:50 Idle adjust, idle adjust hmmm... Oh yeah! That's something I've been going to mention. In all the "backfire" threads, I don't recall anyone saying to turn down the idle to stem the backfire on shutdown. When my idle is lower, it shuts down nicely. If it is idling too high, I get quite a bang. That would be worth telling folks with a backfire question, unless I'm the only guy it happens to. |
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Title: Re: Post White spacer mod... questions Post by machz54 on 05/31/08 at 05:23:30 5A584D45402C0 wrote:
You went down to 145? Go back , put in 150 and adjust idle and I still say NO SPACER ;)[/quote] No I went up to a 155 from a 145 |
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Title: Re: Post White spacer mod... questions Post by justin_o_guy2 on 05/31/08 at 07:17:44 The general rule on "Turns out" for the little needle valve on the right side is just a few turns, right? Its only because the spring tension starts to fall off & the thing can vibrate out? IF thats all there is to it, would a spring off a ballpoint pen, cut off a bit, naturally, stuck in there, work out?Might need a light washer at the spring junction, theres some pretty thin, white nylon , found on the bottom of some drawers...just sayin,, My Dr. uses some really stout magnets, of various thicknesses, all the same diameters. I built her a little doohickey that hangs on her rolling tray, with 3 low spots in it, to set magnets down in, then swing a handle across & strip the magnets off each other. I made it from a nylon cutting board I found in the road. I make stuff outta junk a lot. |
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Title: Re: Post White spacer mod... questions Post by jomiyo on 06/02/08 at 05:37:33 After the weekend i finally got the carb tuned out right. only gives me problems on a really strong decel |
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Title: Re: Post White spacer mod... questions Post by willrph on 06/02/08 at 19:04:21 Specifics Jomiyo so you can help all hte Newbies including me. What mods have you made an what are your final space size, pilot jet size and main jet size? No one wants to reinvent the wheel. I just want ot ride during the short Wisconsin summer. |
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Title: Re: Post White spacer mod... questions Post by jomiyo on 06/03/08 at 05:05:50 just like everyone else on here told me, you really can't give an exact while tuning a carb. The spacer doesn't need to be in there you can rip that right out. then depending on what kind of flow the engine has (exhaust/air intake) you change the idle circuit. if you have a high flow or after-market air filter and a less restrictive exhaust you will most likely need to go up a jet size or two, just to get it right. as posted in this thread LANCER has a good post telling an easy way for carb tuning- Me having no former knowledge about carbs at all, i just followed directions and listened to the engine. after it was all said and done, i have no spacer, my stock jets, the mixture screw is 1 and 7/8ths turn out, and i have a jardine exhaust. i still have yet to pull the plug and check it out, but it sounds great and doesn't have a rich running smell to it. hope this is inspiring -jordan |
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Title: Re: Post White spacer mod... questions Post by Rogue_Cheddar on 06/03/08 at 07:46:23 Just did a rejet and spacer mod myself. I'm running stock air filter but hi flow fishtail muffler. I went 152.5 main and 2 M3 stainless washers in place of spacer (about 1/3 spacer thickness). I love Ace Hardware, they always have just what I need. Bike pulls strong in all gears, occassional pop between shifts, but deceleration is a pretty smooth burble unlike when stock, use to pop and fart all the time. No more backfire at shutoff, just an occassional blup. I think idle mix is 2 turns out. I'm going to run this way for a while and check mileage. If I change air filter to say a K&N drop in, I might go up to the 155 main, but right now seems to be running good. I'm at sea level (but head is in the clouds). :D |
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