minnescoota.com Forum Index
Author Message
<  General Scootering  ~  Help--gearbox issues
Kevin K
PostPosted: Sun Apr 29, 2007 6:34 pm  Reply with quote
Licensed


Joined: 12 Jul 2005
Posts: 783
Location: Brooklyn Park

Riding the parkway today, the P started jumping out of gear. It got worse and I limped it home. Pulled the gear selector box, and checked for a broken selector arm. Everything looks good there. Checked and readjusted the cables.
Finally got it to the point where it would go into, and shift thru, all gears but there's still a noise coming from the gearbox. The noise worsened to a contant knocking (like a rod knock) while the scoot is moving.

Thoughts??? BTW, it has a brand new cruciform.
-K

_________________
Oh yes I did
Back to top
View user's profile Send private message [ Hidden ]
Matty
PostPosted: Sun Apr 29, 2007 7:06 pm  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 1323
Location: MPLS

Kevin K wrote:
BTW, it has a brand new cruciform.
-K


like so new it's your first ride since installing?

_________________
-Matt
-++-you can't spell jackass with out JKSC-++-
Back to top
View user's profile Send private message   Visit poster's website
chris
PostPosted: Sun Apr 29, 2007 7:17 pm  Reply with quote
Licensed


Joined: 15 Sep 2005
Posts: 481
Location: Minnesnapplepuss

while the selector box is off check the selector rod to make sure its tight in the xform. If not then it will spin itself loose and cause the same problem.

Chris

_________________
chicken hooblers! Yum.
Back to top
View user's profile Send private message [ Hidden ]
Kevin K
PostPosted: Sun Apr 29, 2007 9:30 pm  Reply with quote
Licensed


Joined: 12 Jul 2005
Posts: 783
Location: Brooklyn Park

chris wrote:
while the selector box is off check the selector rod to make sure its tight in the xform. If not then it will spin itself loose and cause the same problem.

Chris

OK, for newbie dumbasses like me, what does that involve?
Thanks.
-K

_________________
Oh yes I did
Back to top
View user's profile Send private message [ Hidden ]
Brooke
PostPosted: Sun Apr 29, 2007 9:40 pm  Reply with quote
Licensed


Joined: 06 May 2005
Posts: 215

with the selector box off you can see the round shaft that is attached to the cross. you can pull it in and out and go through the gears. It's reverse threaded. Loc-tite is a good thing but getting it tight is best. you'll need a thin open ended wrench. But once it started happening it can damage the cross real quick.
Back to top
View user's profile Send private message  
chris
PostPosted: Mon Apr 30, 2007 7:18 am  Reply with quote
Licensed


Joined: 15 Sep 2005
Posts: 481
Location: Minnesnapplepuss

what brooke said.

Chris

_________________
chicken hooblers! Yum.
Back to top
View user's profile Send private message [ Hidden ]
Kevin K
PostPosted: Mon Apr 30, 2007 8:10 am  Reply with quote
Licensed


Joined: 12 Jul 2005
Posts: 783
Location: Brooklyn Park

OK, now I know what I'm looking for.
Thanks guys.
-K

_________________
Oh yes I did
Back to top
View user's profile Send private message [ Hidden ]
Derrick
PostPosted: Mon Apr 30, 2007 8:45 am  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 771

Brooke wrote:
with the selector box off you can see the round shaft that is attached to the cross. you can pull it in and out and go through the gears. It's reverse threaded. Loc-tite is a good thing but getting it tight is best. you'll need a thin open ended wrench. But once it started happening it can damage the cross real quick.


How do you Loc-tite a shifting cross when it's already closed up in an engine?
Back to top
View user's profile Send private message  
Derrick
PostPosted: Mon Apr 30, 2007 9:15 am  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 771

Kevin K wrote:
Riding the parkway today, the P started jumping out of gear. It got worse and I limped it home. Pulled the gear selector box, and checked for a broken selector arm. Everything looks good there. Checked and readjusted the cables.
Finally got it to the point where it would go into, and shift thru, all gears but there's still a noise coming from the gearbox. The noise worsened to a contant knocking (like a rod knock) while the scoot is moving.

Thoughts??? BTW, it has a brand new cruciform.
-K


Are the shifting cables new?
Back to top
View user's profile Send private message  
Kevin K
PostPosted: Mon Apr 30, 2007 10:34 am  Reply with quote
Licensed


Joined: 12 Jul 2005
Posts: 783
Location: Brooklyn Park

The cable inners are new. I don't know how old the outers are, but they look like they could be original.

Also, the cross was installed in August. I've put about 3300 miles on it since.
-K

_________________
Oh yes I did
Back to top
View user's profile Send private message [ Hidden ]
Derrick
PostPosted: Mon Apr 30, 2007 11:14 am  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 771

I have seen many old scooters with stiff shifting cables. I think they used some sort of heavy oil or grease to lube them at the factory. Over time it dries up and causes the cables to bind. This causes hard and inaccurate shifting which destroys shifting crosses fast. The best way to check your shifting cables is to remove the selector box from the engine and turn the shifting grip between the gears. It should move easily and "lock" into place at each valley on the "bat wing". You can even remove the selector spring and the cables should move very easily with no binding. If there is any binding, suspect the cables and the gear tube itself. Also, there should be no slop in the selector arm shaft were it goes through the box. This slop can happen if the cables are set to tight and pull to hard on the "bat wing". This is the tip if you want silky smooth shifting and maximum shifting cross life.

Having said all that it sounds like you had a mechanical failure inside the engine. (If it was working good and then just happened on one ride) This may have been caused many things. Poor shifting by the driver, binding cables, rebuilt wrong, or defective parts - to name a few.

The cross is the weak link on a large frame Vespa but it works very well if set up properly. I have never warn out a replacement.
Back to top
View user's profile Send private message  
Matty
PostPosted: Mon Apr 30, 2007 11:25 am  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 1323
Location: MPLS

Did it only happen on the river road? Maybe Charles Denny has something to do with it?

_________________
-Matt
-++-you can't spell jackass with out JKSC-++-
Back to top
View user's profile Send private message   Visit poster's website
nate
PostPosted: Mon Apr 30, 2007 1:13 pm  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 587
Location: Best Saint Paul

Derrick wrote:


The cross is the weak link on a large frame Vespa but it works very well if set up properly. I have never warn out a replacement.


Wearing out parts only happens if you ride them, right?
Back to top
View user's profile Send private message   Visit poster's website AIM Address
Derrick
PostPosted: Mon Apr 30, 2007 1:48 pm  Reply with quote
Licensed


Joined: 19 Jan 2005
Posts: 771

nate wrote:
Derrick wrote:


The cross is the weak link on a large frame Vespa but it works very well if set up properly. I have never warn out a replacement.


Wearing out parts only happens if you ride them, right?


I don't ride scooters anymore. Scooters are for losers.
Back to top
View user's profile Send private message  
Kevin K
PostPosted: Mon Apr 30, 2007 9:35 pm  Reply with quote
Licensed


Joined: 12 Jul 2005
Posts: 783
Location: Brooklyn Park

Proud loser here.
-K

_________________
Oh yes I did
Back to top
View user's profile Send private message [ Hidden ]
Display posts from previous:   
All times are GMT - 6 Hours

View next topic
View previous topic
Page 1 of 2
Goto page 1, 2  Next
minnescoota.com Forum Index  ~  General Scootering

Post new topic   Reply to topic


 
Jump to:  

You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot vote in polls in this forum




Powered by phpBB and NoseBleed v1.09