Minton Madness . . . | Yamaha SR500 Forum

rodentrancher
New Member

Posts: 25

Minton Madness . . . Sept 9, 2006 23:42:45 GMT -5

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Post by rodentrancher on Sept 9, 2006 23:42:45 GMT -5

Well, I just finished putting my modded VM34SS back on the bike. Took 0.04 inch off the slide (vs. 0.05), moved the needle clip to the lowest position, put in a #320 main jet.

It looks like I've converted a bike that ran horribly lean . . . to one that doesn't run at all.

It'll start, run for maybe five seconds, then sputter and die. Does this 2-3 times, then it's flooded and won't start at all till I give it time to clear. Pulled the plug, it's black and oily & I can smell raw gas at the plug hole. (Note - I'm starting with no choke and no throttle.)

Any ideas where I could have screwed up with the mods? An aftermarket carb from ThumperStuff is looking better and better . . .

Last Edit: Sept 9, 2006 23:43:29 GMT -5 by rodentrancher

kentrex
Junior Member

Posts: 52

Minton Madness . . . Sept 11, 2006 9:04:31 GMT -5

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Post by kentrex on Sept 11, 2006 9:04:31 GMT -5

I too had a bike that started easily and ran ok....but I had to tinker. I wanted to let it breathe a little easier as it's saddled with a Motad exhaust for the time being which is even more restrictive than the stock system. So I removed the airbox and fitted a K&N slip-on filter. Still the bike started and ran well, but lacked a bit in the mid range, I had on order a larger main jet (Iwas advised to fit a 350 as I plan to use a less restrictive exhaust in the near future) but in the mean time I thought I would raise the needle a notch to see if that would improve things......guess what? I now have a non-starting bike!! My next move is to put the needle back where it was and I think if you do the same you could be blatting around your neighbourhood very soon.

Ken

kentrex
Junior Member

Posts: 52

Minton Madness . . . Sept 12, 2006 0:35:18 GMT -5

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Post by kentrex on Sept 12, 2006 0:35:18 GMT -5

Having given this a little more thought I realised that the needle position has no affect on starting ability (let me know if I'm wrong) What slipped my mind was that I'd oiled the K&N filter while the carb was off the bike. I think I overdid it, and I think that my starting trouble could be down to this.

I'm off to buy a can of filter cleaner

Ken