Sign in to follow this  
Followers 0
Arizo

Yz426f being a female dog

104 posts in this topic

Hey peeps,

I'm new on thumper but i have been reading as guest for long time.

My problem is, it almost never wanna start...

This is what i did till now.

New spark plug.(it sparks)

Valves adjustement.

Cleaned air filter.

New oil filter and oil.

Fuel filter installed between tank and carb.

pilot jet from 52->45

Fuel screw 1,5 turns out

I am really getting pissed about it because i cant find the problem.

I hope you guys can help me.

Edited by Arizo

Share this post


Link to post
Share on other sites

What is the history of the bike? Is it new to you? Are you familiar with the kick-starting process? Did it start up fine at one point? Was it a sudden change or gradual?

Share this post


Link to post
Share on other sites

I make sure I clear out the cylinder before I kick mine, pull out hot start, pull in decomp, kick 20 times, push hot start back, pull out choke, and kick it, it will start after 2nd or 3rd kick

Share this post


Link to post
Share on other sites

Sorry i forgot, i installed hot cam auto decompression. It starts sometimes after a half hour kicking or something. I removed decompression lever also and put a plug in.

No i do not know the history from the bike and it is not new to me.

Edited by Arizo

Share this post


Link to post
Share on other sites

I'm not too familiar with the auto decompression cam... But is it possible you have it installed wrong? Is the timing good?

Share this post


Link to post
Share on other sites

I am sure it is installed right(triple checked it) it started once and was running good, it is just the starting that is the problem

Share this post


Link to post
Share on other sites

Check to make sure your cams are timed correctly after the install...I had a 426 and had the same problem after installing the same cam...it seemed right at first, was a pain to start so I went back through and found I was 1 tooth off

Share this post


Link to post
Share on other sites

Ok ill do that tomorrow, wel before the hotcam installation it was also almost impossible to start, maybe there was already some timing issue.

I reinstalled it from pictures i took before i took the cams out. There are no marks on the exhaust hotcam to allign with.

Srr for my english

Share this post


Link to post
Share on other sites

There should be marks...usually just a little dot in the gear casting...make sure they both align in the center when the engine is at TDC

Share this post


Link to post
Share on other sites

Just got back in there and there are 13pin between marks, if i put the intake a tooth back it is gonna be 12pins. It needed to be 13 pins right?

Share this post


Link to post
Share on other sites

Forget the tooth count.  The timing marks have to line up, not the two marks on top.  And no, if you back the the intake up until it aligns, it will be 14, not 12.

 

The exhaust cam was made for a 426 and not for a 450, correct?  If so, time it by the marks.

Share this post


Link to post
Share on other sites

Yes 14 i mean srr

yes it is for a 426.

Thx for the help i will get back into ot tomorrow.

I don't have the time now.

Share this post


Link to post
Share on other sites

Previous photo, the chain tensioner was off, now this is a pic while the chain tensioner is installed, looks good to me

1384095056035.jpg

Share this post


Link to post
Share on other sites

I have reinstalled everything, checked my pilot jet it was clogged, i cleaned it and went from 45->48. Still no start.

Share this post


Link to post
Share on other sites

I got my carb off, the jet needle was on 5th clip i put it on 4th (din't see a single person that has it on 5th clip so).

Anything other i need to check while carb is off?

My spark plug is oily but i dont think fuel is getting in there.

Any suggestions?

Share this post


Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!


Register a new account

Sign in

Already have an account? Sign in here.


Sign In Now
Sign in to follow this  
Followers 0