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Post by DOUG (gopher) on May 12, 2007 1:23:53 GMT -5
I got my bike back from the shop and he said he couldn't tune it with the exhaust baffle in it, so it's really loud (not that theres anything wrong with that)
Today I thought I'd put the baffle in and see how it runs. Once it was in my SR idles at about 1500rpm as opposed to 1000rpm with the baffle out.
So I tried to adjust the idle screw and which ever way I turned the screw the Idle would increase, anticlockwise or clockwise.
Is this the normal operation of the idle screw?? Will changing the jets fix this??
Any advice on this would be great
Almost forgot, I'm running a MikuniVM36mm with a K&N podfilter. The exhaust isn't stock, its a short pipe from OVER Racing.
thanks DOUG
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Post by StewRoss on May 12, 2007 3:31:50 GMT -5
Hi Doug, Make sure that the cable isn't up too tight and preventing the slide from dropping all the way back down...you should be able to back the idle screw out and the engine will stop...you weren't adjusting the mixture screw? The idle screw is the bigger one of the two...the brass one with the spring in this  pic... We have a classic club ride tomorrow with BBQ if you'd like to go...I'm taknig my SR. SR  |
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Post by DOUG (gopher) on May 12, 2007 4:18:33 GMT -5
Thanks Stew, I'll check that the slide is dropping all the way, I'm definately adjusting the Idle screw. I'll keep playing around with it cheers. |
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Post by StewRoss on May 19, 2007 3:10:31 GMT -5
Hows the SR coming along Doug? SR |
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Post by DOUG (gopher) on May 21, 2007 3:15:37 GMT -5
Hey Stew, I've taken the wadding out of the exhaust but kept the baffle in it seems to be running ok with better mid to top end performance and it not offensively loud. But I think she is still running rich... I'm in the process of getting jets, slide etc for the carb as listed here www.postdiluvian.org/~mason/moto/SR500/it's right at the bottom of the page. I've got some prices back for the carb bits and I'm almost inclined just purchase the whole carb kit from thumper stuff because it isn't that much extra and its set up already and comes with throttle cable and air filter. Then Ebay my recently purchased VM36 + airfilter to try and get some money back?  I got hold of a glow plug and trying to colourtune the SR is my next step... I've been trying to ask the mechanic how my carb was setup but he didn't write anything down and I think I'm starting to irritate him... |
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Post by StewRoss on May 21, 2007 4:40:14 GMT -5
Heh, heh...don't worry about him. He'll get over it. Interesting that he didn't write anything down. Wonder if he changed anything at all? Still it's simple to find out yourself. If you want a hand with pulling the carby down to check let me know. That reference you gave has the following figures: 6DH3 Needle, 240 main jet, 3.0 slide, 35 idle jet, 159 P-8 needle jet. My Mikuni book says that a standard 36 carby comes with: 6FJ6 needle; 310 main; 1.5 slide; 35 pilot jet; 159 Q5 needle jet The 1.5 slide makes a big difference to the richness of the carby running especially down low and mid range (1/8 to 1/2 throttle)...perhaps a higher cutaway will assist you to clean it up. SR |
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Post by DOUG (gopher) on May 21, 2007 15:59:54 GMT -5
I know he did change the needle and the main jet but I'm positive he didn't change the slide. And the slide is the most expensive of all the parts.
I had a look at the colour tune last night and my idle was fine but my 1/4 throttle looked rich so I suspect that the slide is the main offender at the moment...
I should be good pulling the carb down, thanks for the offer to help... but you might get a call when I need to put it back together... hehe
cheers DOUG
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Post by DOUG (gopher) on May 21, 2007 20:18:07 GMT -5
I opened up the carb this morning and is what i could determine:
6F9 Needle; 240 Main; 2.5 slide
I'm assuming the pilot jet is a 35 and I didn't pull out the needle jet.
I'm tending more toward the purchase of another carb.
D.
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Post by StewRoss on May 22, 2007 5:26:19 GMT -5
Hi, Have you tried to lower the needle and see what effect that has? Go at it 1 notch at a time only. If it goes better with it down a notch then go for a ride and assess it better. Drop it another notch and check that out as well. If it goes worse then raise it a notch from where it was to start with and go again. Your pilot could still be too big as well. This has the most effect below the range you're talking about...but still has an effect. But one thing at a time. Take it out with a fine bladed screwdriver and see what it is in any case. SR |
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