A forum for owners of Yamaha TTR250 trail and enduro bikes!

Members Login
Username 
 
Password 
    Remember Me  
Post Info TOPIC: Bike went from readily starting to not -


Member

Status: Offline
Posts: 22
Date:
Bike went from readily starting to not -
Permalink  
 


Hey guys.  Got the TTR running. Ripped on it today. May not have been such a great idea.  It cranked and ran like a dream. Lots of fun. Then went to start it and got nothing. It sounds as if the starter motor is the only thing turning.  It is making a ticking noise. Bike isn't really trying to turn over.  Occasionally it may exhale one puff from the tail pipe. I haven't noticed a. Rings worthy clunk. Reminder this bike has sat easily for 8 to 10 years in a barn. I sure hope I didn't squeeze the life out of her today. But she dang near blew my cowboy hat off.

I can try to post a video of the noise if that will help



Attachments
__________________


Member

Status: Offline
Posts: 20
Date:
Permalink  
 

If it sounds like the starter is turning . Mine sheared a woodruff key on the flywheel/crank  as the  crank bolt had come loose .

The flywheel turned but not the crank happened with no warning .

 

The other thing that goes on the ttr is the sprag clutch and or starter gears .

I'm sure there will be more info added on here soon 

As for riding it hard they seem to like it .biggrin

 

 



__________________


Member

Status: Offline
Posts: 22
Date:
Permalink  
 

Thanks! I have turned this bike around in 17 days. I am going to enjoy the Thanksgiving break before diving back in. I appreciate your input re the wood ruff key. To me this sounds Luke a more realistic issue than spray clutch. Who knows. I feel all in. The engine feels sound and strong. Enjoyed ripping the ranch. Thanks again.

__________________


Member

Status: Offline
Posts: 20
Date:
Permalink  
 

If it's the key it's a $2 part  and may  need a side cover gasket 

Just in case 

 

Sounds like a good bike 



__________________


Member

Status: Offline
Posts: 22
Date:
Permalink  
 

Thanks again Ttboof - I am looking at partzilla here in US.  The only place I see a woodruff key being used is in the clutch basket assembly.  I attached the screenshot.  Is this what you are referring to? (no. 2 in the parts diagram)  Seems like I will really have to get into the bike - at least I could assess the one-way clutch while I am in there.  Time to drain the oil and take a peek.  



Attachments
__________________


Member

Status: Offline
Posts: 20
Date:
Permalink  
 

No it's on the other side goes into the crank and  fly wheel .

It's part 20 on the crankshaft and piston screen  $7,73 us

Have a read through Brian's replace sprag clutch thread it will help you diagnose the problem also the parts schematic for the starter clutch and starter may help 



__________________


Member

Status: Offline
Posts: 20
Date:
Permalink  
 

This link shows most of the parts 

https://ttr250.activeboard.com/t67552683/sprag-clutch-or-starter/

 

It has a good video of what a sheared key sounds like 



-- Edited by Ttboof on Monday 21st of November 2022 07:31:48 PM

__________________


Member

Status: Offline
Posts: 22
Date:
Permalink  
 

Ok that is starting to look like some pert scary sh!t. I do a lot of repair but am not a trained mechanic. Is that something you believe a decent shade tree mechanic can pull off? Do I have to remove the engine to do that? Look I ain’t sceert I just want to be mentally prepared. Thanks again

__________________


Member

Status: Offline
Posts: 20
Date:
Permalink  
 

It's actually pretty easy to do 

Motor stays in  

From memory just needs the gear lever and side cover off 

Only catch is a side cover bolt hidden behind the starter  gears 

All up can be done in under an hour 



__________________


Super Guru

Status: Offline
Posts: 1290
Date:
Permalink  
 

You can tell if the key has sheared by checking the timing marks through the viewing hole, with the cam cover off and the cam sprockets aligned. If the marks don't all line up you know there's something wrong.
Getting the flywheel off requires a bit of effort which will be wasted if it's not the key that's wrong.

__________________
Page 1 of 1  sorted by
 
Quick Reply

Please log in to post quick replies.



Create your own FREE Forum
Report Abuse
Powered by ActiveBoard