Only "reverse" after rebuild - Yamaha ATV Forum
 
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post #1 of 16 Old 04-04-2005, 04:43 PM Thread Starter
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Only "reverse" after rebuild

My freinds dad rebuilt his Blaster... When put into gear you accelerate backwards only... Needless to say we were all a little shocked... Any idea whats causing this problem?

Thanks :cool:

2004 Honda 450r
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post #2 of 16 Old 04-04-2005, 06:00 PM
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woah... i never heard of anything like that happenin before... post if u ever find out what was wrong

blaster- uni, pb, maxxis, tusk, dg
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post #3 of 16 Old 04-04-2005, 06:05 PM
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LOL its all in the Ignition tell him to double check all the components (Stator, Lose pickup in the fly wheele, Ect.)... It is the motor running back wards. So some thing is way out of wack...

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post #4 of 16 Old 04-04-2005, 07:09 PM
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I actually saw a letter in skirtwheels (did I just say that? Hehe.) where a guy had a tecate with the same exact problem.
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post #5 of 16 Old 04-04-2005, 07:16 PM
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I heard somewhere that 2-stroke motors can run backwards. Try to push start it (in the right direction) and see if that fixes it.

2001 Orange Raptor
2002 motor
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post #6 of 16 Old 04-04-2005, 07:40 PM
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I would not advise really trying to pop start it, in this case it may mess things up. If the motor tried to run backwards, and you try pop starting it, making it run the right way couldn't it bend a rod or something worse from the jolt of the motor quickly changing direction??

Wait, so the bike starts and runs, but when you shift to 1st, what does it do???

You can get some motors to run backwards which is not very good. My tecate was off a little, but it wouldnt fire. What happened to mine is that the stator was too far, causing spark before it should and the kick starter whould shoot back and literally give your foot a bruise on the bottom. A 210psi motor kicking back HURTS LIKE HELL.

Im lost as to how you guys actually got it to run backwards and keep it running.
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post #7 of 16 Old 04-04-2005, 08:02 PM
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are you sure your facing the right way? You face the end with the two metal bars sticking out

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post #8 of 16 Old 04-04-2005, 09:32 PM
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Quote:
Originally Posted by empty-wallet
. A 210psi motor kicking back HURTS LIKE HELL.
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post #9 of 16 Old 04-04-2005, 10:14 PM
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Correct me if Im wrong, but I believe that some older quads had the ability to actualy run in reverse... in order to achieve the desired reverse direction, instead of have a reverse gear. Pretty cool, unfortunantly that doesnt help your problem at all.
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post #10 of 16 Old 04-04-2005, 10:17 PM
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Your timing must be reallly off!

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post #11 of 16 Old 04-05-2005, 12:35 AM
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Quote:
Originally Posted by Klaw
Your timing must be reallly off!
thats what I am thinking

Double check the stator.

2 strokes can and will run opposite direction if the timing is 180 off........different engine's have used this in the past to get reverse.

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post #12 of 16 Old 04-05-2005, 05:37 AM Thread Starter
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Quote:
Originally Posted by Klaw
Your timing must be reallly off!
Yea, I believe thats the problem...

Thanks for the help, allthough I thought keeping it like that would make a one of a kind Blaster...

2004 Honda 450r
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post #13 of 16 Old 04-09-2005, 08:57 PM
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I had a TRX250R ('84 air cooled) that would run backwards. I found out the hard way....trying to climb a hill, killed it, and let it roll backwards a bit before I let the clutch out (no brakes) to slow it down. It started right up. The rotor key had been sheared I guess...never did run right. I got it home (backwards) and it needed crank bearings anyway, so in the process, I pulled the rotor...and yep, sheared key. New key, crank bearings/seals and it ran like never before...and I sold it not long after. That thing was a death trap!

"it is better to appear ignorant than to open your mouth and remove all doubt"

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post #14 of 16 Old 04-10-2005, 09:16 PM
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i had the same problem with my blaster after rebiulding the topend ive ask 4 differnt dealers they didnt know what , for some reason i figured it was the timing key, got a new one put it in and there ya go problem fixed

87 265 MXER
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post #15 of 16 Old 04-11-2005, 12:01 AM
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Timing issue I'm sure. Old Detroit diesels would run backwards, we had a tank truck that always got parked far from the building for when it actually did start backward...

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post #16 of 16 Old 04-11-2005, 09:39 PM
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yeah... like everyone has said its your timing. its actually quite usefull that 2-strokes can run backwards. in many snowmobiles they use that instead of adding the wieght for a reverse gear.
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