The CR saga for me continues...engine frozen

[-df-]

ok...a mate just pointed out that the piston is damaged as well...notice on the left hand side...gutted.

How did I not notice that

[B0000M]

i wouldve said somthing but i presumed ud noticed that!

[cheese]

Do they have a nickasil bore?

You maybe able to just file that groove out where the power valve has come down. Its quite concerning how it has done that though. I'd say that it's snaped, hard to say really.

You will need a new piston I'd say, you maybe the cyliner if farked. Dunno......

[Brian d marge]

This doesn't look like an HPP engine. The HPP ones I owned all had 2 sliding power valves which pulled out from the centre of the exhaust port. This looks more like the later model (97) with a rotating power valve. Is it the original engine (or is my memory failing me)?

its not, I was under the assumption from an earlier post ... the hpp is the sliding blade thing , 93 is the very early if not the first of the rotating valves , Yje early 91 cr had iron bores , dot know about the 93 ,, of top off head

Didnt you say you were kicking it when it Jammed ,,ie slow piston speed ??? without looking at the fotos you might be lucky!!!!

Stephen

[-df-]

its not, I was under the assumption from an earlier post ... the hpp is the sliding blade thing , 93 is the very early if not the first of the rotating valves , Yje early 91 cr had iron bores , dot know about the 93 ,, of top off head

Didnt you say you were kicking it when it Jammed ,,ie slow piston speed ??? without looking at the fotos you might be lucky!!!!

Stephen

Yeah I was just kicking it over when it happened.

[barty5]

as cheese stated you may be able to save bore just have to give it a real porting job to get rid of damaged parts the motor is a 1993 they changed in 1992 to the flap style 91 had the two vales one on each side.

[vr4king]

My 92 cr125 has the blades on each side.......
Man thats gotta suck for you got me all worried now as i havent even really taken mine for a ride yet and the guy did say its got about 30 hours on piston
I have spent the last week or so just goiving it a birthday,Cleaning power vavles,new air filter,etc

In my manual it mentions that water pump inspection bolt which im gueesing is the drain bolt you guys are refering to but it says nothing should come out of there it says if coolent does your pump seal is poked and if oil does your really stuffed lol.........i pulled it and coolent did come out FAST but according to my thinking it should

[-df-]

My 92 cr125 has the blades on each side.......
Man thats gotta suck for you got me all worried now as i havent even really taken mine for a ride yet and the guy did say its got about 30 hours on piston
I have spent the last week or so just goiving it a birthday,Cleaning power vavles,new air filter,etc

In my manual it mentions that water pump inspection bolt which im gueesing is the drain bolt you guys are refering to but it says nothing should come out of there it says if coolent does your pump seal is poked and if oil does your really stuffed lol.........i pulled it and coolent did come out FAST but according to my thinking it should

Wouldn't worry about it aye. Mine had a full rebuild 10 hours ago, it was just the power valves time I guess

I'll let you guys know how I get on once I grab a manual for it so I can figure out these powervalves.

[Reckless]

HI bud Here goes nothing!

Attached a pic of my 01 barrell just so happens I'm doing the strip down now. It doesn't look much different in the way the power valve is set up. Mine is a flapper.

Looks to me like the pin on yours could have broken (that is if it is similar to mine). The pin is on the left hand side of the mounting bolt that goes through the bearing. There is a stop on the cover that holds it in. Get some needle nose pliers and pull it out. It carbons up so might need to soak it in crc etc and wiggle it a bit. Power valves are a surprisingly simple system so as long as you note how it came apart you should be ok to put it back together.

There are two things that are of concern from the pics.
1/- Finding why the power valve failed and fixing it.

2/- The damage to the top of the exhaust port in the early pics where you have driven the power valve up into the barrell. But over all it doesn't look to bad.
Strip the power valve etc out and I suggest you take the barrell to your local engine recon place plead poverty and ask them to feather the edges of the damage so the rings will not hang up on it. You won't loose much if any power as its so low down and close to the port opening anyway. The rest of the barrell looks good so you might be lucky.
If that goes well its just a piston kit, and any gasket you may have torn getting it apart.
Don't forget to do the ring end gap b4 you put it back together most people forget this or dont know to do it.
Mine has A and B piston sizes, 4 when you order yours. There should be a stamp manually punched (not a casting type) into the barrell somewhere. Mine is on the side of the mounting bolt lug at the bottom outside of the barrell.

Hopefully Ive got everything correct but there is a couple of guys posting that have more knowledge of the early models and may be able to add to the above.
Good luck. Jeepers I'll do anything for a BG!! haha!!

[-df-]

HI bud Here goes nothing!

Attached a pic of my 01 barrell just so happens I'm doing the strip down now. It doesn't look much different in the way the power valve is set up. Mine is a flapper.

Looks to me like the pin on yours could have broken (that is if it is similar to mine). The pin is on the left hand side of the mounting bolt that goes through the bearing. There is a stop on the cover that holds it in. Get some needle nose pliers and pull it out. It carbons up so might need to soak it in crc etc and wiggle it a bit. Power valves are a surprisingly simple system so as long as you note how it came apart you should be ok to put it back together.

There are two things that are of concern from the pics.
1/- Finding why the power valve failed and fixing it.

2/- The damage to the top of the exhaust port in the early pics where you have driven the power valve up into the barrell. But over all it doesn't look to bad.
Strip the power valve etc out and I suggest you take the barrell to your local engine recon place plead poverty and ask them to feather the edges of the damage so the rings will not hang up on it. You won't loose much if any power as its so low down and close to the port opening anyway. The rest of the barrell looks good so you might be lucky.
If that goes well its just a piston kit, and any gasket you may have torn getting it apart.
Don't forget to do the ring end gap b4 you put it back together most people forget this or dont know to do it.
Mine has A and B piston sizes, 4 when you order yours. There should be a stamp manually punched (not a casting type) into the barrell somewhere. Mine is on the side of the mounting bolt lug at the bottom outside of the barrell.

Hopefully Ive got everything correct but there is a couple of guys posting that have more knowledge of the early models and may be able to add to the above.
Good luck. Jeepers I'll do anything for a BG!! haha!!

Cheers dude, I'll try and have a look at it tonight, otherwise it wont be till the weekend.

I'll let you know how I go...

[-df-]

Just been working out the finances...going to have to wait until after the wedding definatly now...oh well, at least it will have a full rebuild of top and bottom end then...just to make sure.

Thanks for all the help, might see some of you on the track after september (don't know how I'm going to wait until then to ride again)

[cheese]

you could try econohonda for the parts or ebay. they are a bit cheaper.

[Danger]

Just been working out the finances...going to have to wait until after the wedding definatly now...oh well, at least it will have a full rebuild of top and bottom end then...just to make sure.

Thanks for all the help, might see some of you on the track after september (don't know how I'm going to wait until then to ride again)

Dude! Snap out of it and get your priorities sorted! Just drop of a couple from the guest list. It aint going to be that expensive to fix!

[Reckless]

yeh mate just keep goin at the work you can do yourself.
Strip the power valve etc an get the barrell checked out first. Then worry about the piston kit and parts. Kits for early model bikes are occasionally on Trade me. Doesn't look to me like you have to touch the bottom end. We'll help out where we can.

[-df-]

Yeah, I'll strip it all down ready to be put back together again.

Its just I'm working half days due to something at home, and also saving for the wedding, so even $300 is alot at the moment (esp when I couldnt even afford the bike in the first place). Cry me a river and all that.

Oh to be working full time again...Roll on september!!!