Cant get my cr125rl started

[Hello Everyone]

Just rebuilt my honda cr125 1990 had the cylinder resleeved and new piston and ring just the usual stuff that goes with that new gaskets and such but it just wont start i checked the reeds and they have no damage but i have ordered new ones any way its getting fuel and a spark i carried out a compression test and it stops about 110psi i cant bump as dont have the room and when i open the throttle i am getting blow back through the carb into the air box i have never came across this prob before could it be an upside down piston ring and the reed valves i read some where about someone having to flip over the piston ring before they could get their bike started 

Edited May 28, 2018 by Hello Everyone
Missed info out

[nino]

110 is really,really low! It should be 150+

So my guess is you may have a blown crank seal? Check for oil behind the flywheel! This would be a clear sign. Instead if it made smoke it would be the blown right side seal.

Did you mount the piston correct? There is a fore and aft direction! If you have a window on the piston it should face to the intake. The ring needs to be installed with the mark facing up.

New gasket on the head? You can't re-use the Honda gaskets!

[Pygmy Warrior]

I hope your rebuild is better than your grammar!

[Need some help]

I hope your rebuild is better than your grammar!

That’s great, just great.....

[nino]

15 hours ago, Pygmy Warrior said:

I hope your rebuild is better than your grammar!

i'd say we understand what he meant....;)

 

Edited May 30, 2018 by nino

[arthur6]

I hope your rebuild is better than your grammar!

Yeah it's kind of funny how a guy says he rebuild his engine but he can't construct a complete sentence or even a sentence we can read.

This is still another "I rebuilt my engine and now it won't start" thread.

 

 

 

[Hello Everyone]

On 29/05/2018 at 6:01 AM, nino said:

110 is really,really low! It should be 150+

So my guess is you may have a blown crank seal? Check for oil behind the flywheel! This would be a clear sign. Instead if it made smoke it would be the blown right side seal.

Did you mount the piston correct? There is a fore and aft direction! If you have a window on the piston it should face to the intake. The ring needs to be installed with the mark facing up.

New gasket on the head? You can't re-use the Honda gaskets!

Cheers bud al give the seals another check 

[Hello Everyone]

On 29/05/2018 at 9:26 PM, Pygmy Warrior said:

I hope your rebuild is better than your grammar!

Am no interested in grammar takes time to fxxk about with it on my phone 

[Hello Everyone]

On 30/05/2018 at 1:31 PM, arthur6 said:

Yeah it's kind of funny how a guy says he rebuild his engine but he can't construct a complete sentence or even a sentence we can read.

This is still another "I rebuilt my engine and now it won't start" thread.

 

 

 

Thats predictive text bud al remember and check my p's and q's next time 

[Pygmy Warrior]

50 minutes ago, Hello Everyone said:

Am no interested in grammar takes time to fxxk about with it on my phone 

I am not interested in trying to decipher what you are asking! It takes my time too!! 

[twinstar king]

Its a real bummer when people reply to a topic to talk down the original poster, when you can understand what they are asking, and they give you enough information to start a discussion. Even if he didn't provide any information there is no place for a negative comment, especially when someone is only asking for advice.

[Hello Everyone]

55 minutes ago, Pygmy Warrior said:

I am not interested in trying to decipher what you are asking! It takes my time too!! 

A never asked you tae you chose tae answer am sorry a dont speak or write the queens English but am scottish and al write whit ever way a want if ye dont like it then dont read it simple as that 

[Hello Everyone]

1 hour ago, twinstar king said:

Its a real bummer when people reply to a topic to talk down the original poster, when you can understand what they are asking, and they give you enough information to start a discussion. Even if he didn't provide any information there is no place for a negative comment, especially when someone is only asking for advice.

Its called ignorance if he had nothing to say productive then why jump in 

[On_The_Pipe]

As has been mentioned make sure the piston is installed the proper direction.   I'd be checking that first.  

[Hello Everyone]

3 hours ago, On_The_Pipe said:

As has been mentioned make sure the piston is installed the proper direction.   I'd be checking that first.  

I double check everything before putting the head on the ring marker is facing up on the top of the piston it has in stamped on it so that would go to the inlet manifold i will pull the head today and put new seals and gaskets on again i always keep 2 or 3 full gasket kits and seals just in case thanks bud 

[Hello Everyone]

On 29/05/2018 at 6:01 AM, nino said:

110 is really,really low! It should be 150+

So my guess is you may have a blown crank seal? Check for oil behind the flywheel! This would be a clear sign. Instead if it made smoke it would be the blown right side seal.

Did you mount the piston correct? There is a fore and aft direction! If you have a window on the piston it should face to the intake. The ring needs to be installed with the mark facing up.

New gasket on the head? You can't re-use the Honda gaskets!

I swapped the seal over and you were spot on bud no idea why the other one failed it was the one that wiseco sent with the kit the one i put on came from seal and bearing place in scotland it is far stronger and has a far better seal think i will just swap the other side aswell thanks

Edited June 1, 2018 by Hello Everyone

[Hello Everyone]

Thanks for the help folks she has now started i reset the carb and the stator plate wasnt in properly because of a spacer put in by the last owner it was sparking but once the plug was in it had an intermittent spark 

[Smokey450r]

110 psi still low man, did you kick it 10 times and then checked it to me makes a tad bit more accurate. But when it was sleeved it’s usually an A bore you might have a B piston. Just my cents man hope it all goes good.