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Old 07-09-2009, 12:19 PM   #1
edeher OP
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1986 XT 600 Raptor carb conversion, pics tonight.

I just got the dual carb setup off a 2001 raptor 660 and its soaking in the parts cleaner at work. I will put it straight on the bike when i get home and take a couple pics and let who is interested know how and if it runs with this set up. It will definatley have to be re-jetted but ill see if it starts like this. The xt jets might even fit in the raptor carb....both yamaha jets.

There are three vacuum/air intakes on the carb, two to lift the throttle body, i know because they lift when i blow of them. There is also another vacuum or air intake between the two carbs connecting them and it is on a swivel.... i have no clue what it is for but i will leave it disconnected and see if it starts, maybe run a hose to the airbox or intake manifold....see which one works better.

Anywaz i will update when i get home and put it on, The carb set up still has the thumb throttle set up on it so that will be fun to try on a motorcycle.....
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Old 07-09-2009, 02:38 PM   #2
ShadyRascal
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You can get a twist throttle conversion for those, advertised in any ATV magazine.

I have some experience with those carbs, they've worked well for me.

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Old 07-09-2009, 03:16 PM   #3
edeher OP
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yea? how much for the conversion? i was thinking about putting the cable straight into the xt twist assembly.


WHat is that vacuum looking one connecting the two carbs on a swivel? where does that go?
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Old 07-09-2009, 05:55 PM   #4
edeher OP
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Well still no go...First the carbs would not fit but i opened the intake manifold up a little with a dremmal and not it fits....put fuel to it and it will not start or even backfire....i dont know what it could be....i left all the vacuums and air intakes open since they all seem to go to the airbox anywaz.... here are some pics, let me know if you have any ideas...

The only thing i can think of is maybe the plug is fouled. i know the guy said he put in a new one but since the gas was old and the carbs were running like crap maybe it fouled that fast..... possible?











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Old 07-09-2009, 06:24 PM   #5
edeher OP
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bump...any ideas?
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Old 07-10-2009, 04:30 AM   #6
edeher OP
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bump
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Old 07-10-2009, 05:52 PM   #7
edeher OP
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ok...i flushed out the tank and put new gas in and added a fuel filter. I put the new carbs on with no air filter on and i got it to start once but it died and wouldnt start again...there is no choke on these raptor carbs though... something i didnt think of
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Old 07-10-2009, 06:09 PM   #8
Olas
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Have you tried turning the idle up a bit more? If you got it to start that is a good sign!
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Old 07-10-2009, 06:13 PM   #9
edeher OP
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i tried pushing some throttle but nothing...thats the same thing basically
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Old 07-10-2009, 07:00 PM   #10
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Theoretically,yes, it is basically the same but it wouldn't hurt to try! Who knows, maybe the throttle you are giving it is too much when the bike is cold....
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Old 07-10-2009, 07:09 PM   #11
edeher OP
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true thats a good point. I was also concerned about that connector. It is number 6 in this diagram and connects to number 51 which is a spring/ compressor???? I have no clue what this does...maybe this is why it will not start. I might have to buy part 51 or find out what it does to try and resolve it some how.
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Old 07-10-2009, 07:09 PM   #12
edeher OP
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http://www.google.com/imgres?imgurl=...num=1&ct=image
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Old 07-10-2009, 07:42 PM   #13
edeher OP
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im thinking it may be linked to the other two connectors that lift the throttle bodies and it has to be blocked off for them to be lifted properly...
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Old 07-10-2009, 08:03 PM   #14
edeher OP
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just got the bike to start with starter fluid and i could rev it once it started but it will not idle...and it sounds like shit!!! at least i know its something with the carb and its a step forward!
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Old 07-11-2009, 09:11 AM   #15
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Did you actually take the carb apart and clean it? I would start off by doing that and then deciding if you need different jets. The pilot jet could be clogged up causing it to stall out. Do a thorough clean and take your time, do it right the first time, it will pay off in the end!!
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