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 Post subject: Transmission issue?
PostPosted: Tue Jun 16, 2020 8:02 am 
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Joined: Sun Oct 30, 2011 5:42 pm
Posts: 74
Location: Scottsdale Az
Good Morning Kawi2strokers, Just wanted to see if this is a major issue.
I have a 72 H2. When its idling and in First gear with the clutch pulled in, I cannot back up or push back without it locking up. What could be wrong with it?


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 Post subject: Re: Transmission issue?
PostPosted: Tue Jun 16, 2020 8:12 am 
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Joined: Tue Jun 07, 2011 6:36 am
Posts: 2714
Location: Dandridge, TN, USA
That is normal. Don't force it or serious damage will occur.

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 Post subject: Re: Transmission issue?
PostPosted: Tue Jun 16, 2020 9:15 am 
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Joined: Tue Jun 07, 2011 6:37 am
Posts: 10460
Location: Rio Rancho, New Mexico
Dale is correct, never back up in gear. It can engage the kick start and slam down breaking cases and could cause you much damage too! :shock:

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 Post subject: Re: Transmission issue?
PostPosted: Tue Jun 16, 2020 11:59 am 
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Joined: Sun Oct 30, 2011 5:42 pm
Posts: 74
Location: Scottsdale Az
Thank you Gentlemen for the advice.
I do have a second 72H2 and it does not do that.


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 Post subject: Re: Transmission issue?
PostPosted: Tue Jun 16, 2020 3:49 pm 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9999
Location: North Central NC
Ja-Moo wrote:
It can engage the kick start and slam down breaking cases and could cause you much damage too! :shock:

Actually it's the Yamaha twins that I've seen photos of that slammed down the starter and broke the case. Triples can't engage the kickstart lever with the engine like that since the starter stuff is after the clutch and you're holding in the clutch lever when you're trying to back up in gear, they just have 1st gear grab the mechanism and lock up... also possibly breaking something admittedly.

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If it surges, that's normal, upshift.


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 Post subject: Re: Transmission issue?
PostPosted: Tue Jun 16, 2020 8:07 pm 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4612
Location: Milang, South Australia
It's a good way to break the shift drum, tho. why you would want to do that (clutch it in gear and push backwards)anyway is beyond me.

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 Post subject: Re: Transmission issue?
PostPosted: Wed Jun 17, 2020 7:11 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9999
Location: North Central NC
When I had my transmission apart recently I looked at what happens when you do it. 1st gear on the output shaft snags the kickstarter gear and pulls it back on the helical spline, engaging it. Since 1st gear is turning the wrong way, it tries to move the starter lever backwards, and of course it won't go that way so it locks. The shift drum isn't unusually loaded, and the engine running isn't involved, but it could bust 1st gear or break the kick starter mechanism if you did it hard enough.

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If it surges, that's normal, upshift.


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 Post subject: Re: Transmission issue?
PostPosted: Wed Jun 17, 2020 7:55 am 
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Joined: Thu Jun 09, 2011 7:03 am
Posts: 4612
Location: Milang, South Australia
Do you have a theory on broken shift drums, Jim? I've seen broken drums, they seem to link to this situation, but, never having done it myself......!? :think:

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"One day, your life will flash before your eyes. Make sure it's worth watching." : anon.


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 Post subject: Re: Transmission issue?
PostPosted: Wed Jun 17, 2020 8:08 am 
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Joined: Sun Oct 30, 2011 5:42 pm
Posts: 74
Location: Scottsdale Az
RODH2 wrote:
It's a good way to break the shift drum, tho. why you would want to do that (clutch it in gear and push backwards)anyway is beyond me.


I stopped at a light and was over the white line so I need to push back a bit to give more room to left turning traffic


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 Post subject: Re: Transmission issue?
PostPosted: Wed Jun 17, 2020 9:15 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9999
Location: North Central NC
RODH2 wrote:
Do you have a theory on broken shift drums, Jim? I've seen broken drums, they seem to link to this situation, but, never having done it myself......!? :think:

Nope, I sure don't. :) As a guess, maybe once things break, if you're still rolling backwards, or if you let out the clutch, the broken parts can shove the shift fork hard. Of course at that point about anything could get broken.

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If it surges, that's normal, upshift.


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