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Fritzer108

1994 YZF750R won't start

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I have a '94 YZF750R that won't start when it's cold. It turns over but never catches. If I remove the airbox and place my hand on the carbs to choke it, it comes to life, telling me that it is too lean and not getting fuel. Is this correct? I would like to note that the choke was fully engaged when I start it. 

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Is the choke lever on the bars? Is it actually doing anything at the carbs?

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It's on the frame below the tank on the left side of the bike (shifter side). I can hear a click in the carbs when I pull it. 

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When was the last time it started normally?

 

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I honestly can't tell you. I received it from my neighbor...someone abandoned it in his yard, but it had a clean vin and I got a salvage title for it. I did have it running about 4 weeks ago, but that required copious amounts of starter fluid. Once it warmed up, it idled fine at 1150 and would start up if I turned it off. 

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I'd say the carbs need taking off then, and a good clean. The choke circuits are probably blocked.

 

If you can find somewhere that does ultrasonic cleaning I'd recommend that

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3 hours ago, finnerz89 said:

I'd say the carbs need taking off then, and a good clean. The choke circuits are probably blocked.

 

If you can find somewhere that does ultrasonic cleaning I'd recommend that

Clean the tank as well if that has been lying I assume there will be rust inside. I've used a length of light chain, but others use nuts and bolts or small stones. Fit an inline fuel filter as well

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Yep, as said. Clean carbs and good fuel in this situation.

No short cuts either. 

 

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Update:

 

I replaced the oil, coolant, and put good fuel in it. After a little coaxing, I got it idle nicely and let it run for 3 hours ( I made sure the temp was always in the normal range). I think it managed to clean out the minor gunk by itself because like I said, this bike was running before it was abandoned. It's been 2 days since my last post and she starts very nicely now...hot or cold....usually no more than 3 cranks if even that.

Next thing to see is if I can tighten the clutch...it doesn't disengage all the way. 

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result 👍

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