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  #1  
Old 03-25-2004, 08:17 AM
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Default OT: Yamaha IT490

Does anyone have any information on the yamaha IT490. Im just wondering what size carb it had stock and if anyone knows the jetting for that bike it would be great

thanks.
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  #2  
Old 03-25-2004, 12:32 PM
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Default OT: Yamaha IT490

Why do you want to knwo this??
Are you getting a IT490 motor to put in your grass hopper or what??
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Old 03-25-2004, 01:36 PM
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Default OT: Yamaha IT490

I posted a link to some specs in the Sport Quads forum....But to answer one of your questions, according the website, stock carbs were Mikuni Vm38ss carb..
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Old 03-25-2004, 03:58 PM
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Default OT: Yamaha IT490

My dad has one sitting out in his garage...he NEVER rides it! He bought it new (I believe in the late '70's) and rode it alot but since he got his banshee he never rides it...the last time he rode it was when I was a kid (well over 5 years ago). I can find that info if you want...I'll post back...
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Old 03-25-2004, 04:37 PM
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Default OT: Yamaha IT490

defently.
thanks.
Im basically going to put one in my blaster because it bolts in real easy. I just dont know what I will need for carburation (size and jetting).
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Old 03-25-2004, 07:24 PM
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Default OT: Yamaha IT490

Ok, the carb is a 38mm and the stock jet sizes are 370 main, 50 pilot, and Q-2 needle. The model number is VM38SS made by Makuni. The carb is fairly big too but it should fit on a Blaster, I know someone who used a carb off of an LT250 and it worked great also! Hope this helps and good luck with gettin it workin!
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Old 03-26-2004, 06:37 AM
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Default OT: Yamaha IT490

Ya man, Good luck, Your gonna need it! haha
Trying to find all those parts around hear is gonna be a job, Cuz you really need a whole bike, Not just the motor, You need like the CDI, and carb and all that good stuff!
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Old 03-26-2004, 09:30 AM
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Default OT: Yamaha IT490

Another question for you quys?
Well 2
Is the YZ490 the same motor???
and Woulden the out put shaft be Very weak on a IT490?? Like Because its made to spin ONE small wheel
Not TWO big ones??
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Old 03-26-2004, 09:03 PM
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Default OT: Yamaha IT490

How would that hook up to the air box. i think i would need to remove and run a straight clamp on, or modify the box somehow so that the carb will fit. The 26mm on the blaster now fits in there just snug. I cant see a 38mm fitting at all.
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Old 03-26-2004, 09:03 PM
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Tags
490, blaster, carb, carburetor, info, it490, jet, jetting, made, mikuni, otyamaha, sizes, specs, vm38ss, yamaha



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