The CR saga for me continues...engine frozen

**-df-** · 29th May 2007, 17:39

ok, I tried the kickstart after I pulled off the side panel, and now that seems to have free'd up some movement some how...it now does the same as turning the wheel.

So...off comes the head...and all I can say is holy shit...way easier then a 4 stroke...love not having valves!!!

now...there is something jamming the piston on the up stroke...no idea what the hell it is...it looks like something has come out of the ports and jammed the piston!!!! never seen something like this before (but then I know 4 strokes). I'm charging the camera as we speak and will take a picture of whats going on.

I'm stumped, but its DEFINATLY not the kickstart...giant bit of metal sticking out of the ports I think (but can't tell very well).

**-df-** · 29th May 2007, 17:42

EDIT: never mind, sent a PM

**-df-** · 29th May 2007, 17:55

another thing, seeing as I can't rebuild this straight away, whats the best thing to do with the open engine, don't want it to rust or anything before I can redo it...been to long since I've done an engine and can't think (normally do them striaght away when I did them)

**-df-** · 29th May 2007, 18:27

Well...it looks like the barrel is damaged.

DAMNIT, only ridden the damn thing for 30mins and it does this...guess it shows you should really buy a new bike

If anyone knows a cheap way of fixing what has happened please let me know...I've got my wedding on the 1st of september and if I spend much more money on this my misses is going to kill me!!! Already took the money out of the wedding funds to pay for the bike...After September I'm free to spend some serious dosh on it...like a 300cc big bore...oh yeah.

Free blow jobs to the man that helps me (please note...pisstake in action...unless my misses thinks its a cheap way to fix the problem

)

**Buddy L** · 29th May 2007, 18:57

So thats the front of the barrell, where the object is, exuast side? It looks like the power value as come un stuck. Lift off the barrel and have a little tinker and see if you can get it out, or back into its right place?
But on the other hand, you no the guy selling it, is telling you the truth about having a new piston in their.

**-df-** · 29th May 2007, 19:03

Originally Posted by Buddy L

So thats the front of the barrell, where the object is, exuast side? It looks like the power value as come un stuck. Lift off the barrel and have a little tinker and see if you can get it out, or back into its right place?
But on the other hand, you no the guy selling it, is telling you the truth about having a new piston in their.

Just making sure I'm not getting confused, you are saying that it looks like a new piston? I'm pretty sure it is after looking at it myself as it looks pretty clean...

How the hell do you take a barrel out? might be a bit beyound me to be honest unless a manual would tell you how (barty5 offered me his to borrow which I'll take him up on now!!) Guessing you need a press to do that?

The guy did tell me he played with the power valve so it would open better (said it would lift the front in top gear...altho with my wieght it wont).

**Reckless** · 29th May 2007, 19:10

Originally Posted by Reckless

Doesn't sound good. Sounds like something has shit itself and the crank is only turning 1 revolution each way.

OK looks to me like the power valve assembly is poking through into the bore. Dont like that nasty bit where it has had the piston under it and gone into the side.
But let me know what we are dealing with. If its an 07 CR we want to get new stuff but if its a 91CR we wll see what we can do!!

The wire trick would have worked here as the piston wasn't getting full stroke and you would have sussed it. Trying to kick start it wouldn't have helped either.

So take the barrell off. Strip the power valve out. Take the piston off and see what is damaged and what is not. Make sure to note if there are any missing bits or splinters that might be in the gearbox. As soon as you can stuff a rag around the conrod (B4 you remove the c-clips on the gudgeon) to stop anything from dropping in.

A new bike can do this as well. So don't sweat it.

By the way tell your missus I love BG's and am here to help!! haha!!

Good luck

**-df-** · 29th May 2007, 19:12

Originally Posted by Reckless

OK looks to me like the power valve assembly is poking through into the bore. Dont like that nasty bit where it has had the piston under it and gone into the side.
But let me know what we are dealing with. If its an 07 CR we want to get new stuff but if its a 91CR we wll see what we can do!!

The wire trick would have worked here as the piston wasn't getting full stroke and you would have sussed it. Trying to kick start it wouldn't have helped either.

So take the barrell off. Strip the power valve out. Take the piston off and see what is damaged and what is not. Make sure to note if there are any missing bits or splinters that might be in the gearbox. As soon as you can stuff a rag around the conrod (B4 you remove the c-clips on the gudgeon) to stop anything from dropping in.

A new bike can do this as well. So don't sweat it.

By the way tell your missus I love BG's.

Good luck

Its a '93 CR250 (just changed my title).

Can someone tell me how to take the barrel out? Don't have that in cars...

I'll let my misses know

**Reckless** · 29th May 2007, 19:14

Have to go 4 tea but if there is no more damage you might be lucky with this one!!!

**Reckless** · 29th May 2007, 19:19

not sure on a 93 but probably release the power valve arm under the top side cover on the barrell. Then simply undo the four bolts at the base of the barrell. Crack the gasket with a light blow with your hand or a rubber hammer where it joins the crankcase and slide it up over off the piston. then stuuff the rag around the hole. Don't force anything to hard.

Check in after tea OK

**Buddy L** · 29th May 2007, 21:13

Originally Posted by -df-

The guy did tell me he played with the power valve so it would open better (said it would lift the front in top gear...altho with my wieght it wont).

If he played with it, he probley put it back together wrong. And thats why the power value has poped out on you.
Hopefully it hasen't done damage to your barrel?
As reckless stated their should only be 4, bolts holding the barrell on.
I'll try and find a expolded view for you. Of the power value system.

**Paulus** · 29th May 2007, 21:35

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)?

**-df-** · 29th May 2007, 21:40

ok...got the barrel off.

Here are some more photos. Not sure how to deal with the power valve...never dealt withone before. first 2 are of the barrel off, 3rd is it upside down, 4th is the powervalve cover, 5th is the piston (not that it matters).

EDIT: actually...maybe I took them all upside down looking at it again

**-df-** · 29th May 2007, 21:41

Originally Posted by Paulus

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)?

Not sure if this is the original engine, would have to have a hunt for the engine number...I just presumed it was the original one.

**jeremyb** · 29th May 2007, 21:54

Originally Posted by Paulus

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)?

Ya, my HPP CR125 had the two blades like you describe as well

Thread: The CR saga for me continues...engine frozen

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