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Yessir.
I’ve seen some people use a few lengths of wire dropped down inside the pipe attached to a drill to break up some of the stuff further inside as well.
That’s a great add Chance. I have tried most of the suggested tips. From using nuts/bolts and vigorous shaking, the flexible shaft spun in a drill, to a long bladed screwdriver just chipping away. It was suggested to use nuts/bolts with gas and shake that up in the pipe. No way was I going to agitate gas with steel bolts against more steel.
Unfortunately what worked best was a mini oxy/acetylene set up. Like what HVAC guys carry up to units to braze. I would love a full sized set of tanks but very expensive.
Using a propane torch would/could work but they heat smaller areas.
I just heated the head pipe area and the rest of the pipe so the interior was smoking. Let it cool and than lightly tapping on the pipe dislodged the carbon.
An acetylene set up minus the oxygen would work just fine. $279 for a regulator and, two torch tips. It’s exactly what I use for brazing at work. The benefit is you can at least swap out the tips. A-32 being the largest. I figure if I can braze 4” copper using an A-16 tip it would definitely work clearing carbon from the pipe.
With a PC works pipe I used a A-8 to bring out the weld coloring. The only draw back is the initial purchase and, getting the acetylene tank filled. I think they’re around $55 in my area to fill.
I bought three bottles used a few years ago off of Craigslist for $150.
I could use a little help here. I rebuilt my shock and was putting on my components. everything was fine until i got to the chain. now there is no room for the chain to go between the roller and the chain guide. the roller is the same size as the one on my 125. What am i doing wrong?
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The roller should be 34mm diameter.
Is the shock too long?
Thank you for having me check! yes.
the shock should look like this where the nitrogen can looks like a bullet
But the one on the bike looks like this
here is a similar one i found when i looked for a 98 on ebay.
bloody hell. explains why the chain roller was just bearings on the bolt when I tore it down.
This might help...
https://www.thumpertalk.com/forums/topic/1304932-honda-cr-250-shock-length/
absolutely helps, thank you!
You can shorten a shock by adding a spacer on the damping rod under the piston.
Wonder what year that shock is? I was able to use a 96 CR250 shock on my 94 Cr250 build with just a trim of the upper shock mount for width..
Damn dogg, your bike is super clean! I really want to find a works style pipe. The one on it has seen much better days. I found a Doma on ebay but it is like $450.
I bought a correct shock last night on ebay. Salvage the rebuild kit from the wrong shock and rebuild the ebay one. pretty weird setback.
Pro Circuit has them in stock...
https://www.procircuit.com/works-cr250r-95-96.html
Yes..contact PC by phone, I was able to buy a new works pipe for 93-95 & 95-96 a few years ago, they do occasionally make a batch of new pipes…
@Last2Stroke - thank you for pointing me to the long shock. I replaced it this weekend with the correct year shock I picked up off of ebay. I rebuilt it and installed it, everything lines up as it should.
Now for another problem, I rebuilt the top end and got everything together. I am still waiting for a new tank to arrive but thought I would at least see if it would fire up. So I put gas in the old tank and it started but smokes like a mofo. I took it around the block to see if I could clear it out, but the streets looked like I was spraying for mosquitos. Bad coil or crank seal? It does glarble on the high revs like my 125 did before I changed the coil. I should probably get a new coil anyway. But the 125 didnt smoke like that. There was a lot of spooge on my rear fender.
Here is a video i took of the excessive smoking:
https://x.com/bonseff/status/1761901458163687645?s=20
Here is a pic of the plug. It wasn't wet.
Any help would be appreciated to point me in the right direction. Reeds looked fine on it. It has new jets. I am running 52,172, 3rd, 1.5 out.
That much smoke is too much for a jetting issue, it's either sucking fuel or gearbox oil.
Do a pressure test to check if it's sucking oil...
https://www.thumpertalk.com/forums/topic/432226-pressure-testing-a-2-stroke/
If it's the crank seal, replace the seal and collar as a set...
Leaks can develop between the crankcases...
If the float height is too high, floats are leaking, or the float valve is leaking, the bike will run rich, I think stock float height was 18mm.
A jet block gasket leak will also cause the bike to run rich.
https://www.jetsrus.com/individual_parts/021-760_su.html
Wow. So the seal had backed all the way out basically. Made it really easy to pull it.
Bought a 94 that had been sitting forever in a guys garage, cleaned carb, air filter, new trans fluid…just wanted to fire it up to see what I had, same thing… bug sprayer … same rt side crank seal as yours, seal was hard as a rock😂
Pit Row
I feel pretty dumb because I had that cover off and the clutch basket removed to replace the bent shift shaft. Didn't even notice the seal.
No more mosquito killin for me, just the sweet smell of 927
https://twitter.com/bonseff/status/1762639143908118989
Yeah buddy.
Been slow to post because life has been life, but finally got a black Clarke tank. The petcock from the stock tank didn't transfer so I had to make a gasket out of an old tube. They guy who does my graphics moved shop locations so he was down for a few weeks. I got an update from him this morning that made me happy. The 125 and the 250 should look pretty much the same besides the number plates. I was playing around with the 250 and when I recreated the swingarm graphics, I liked the number treatment Honda had on them back in the day so I repurposed the number artwork into numbers for the panels.Will be excited to see these two side by side once the decals are on the bike. Even more excited to take them both to a track on a practice day.
Good job on this CR, mate!
That honda has been a box of surprises (chain buffer, shock, crank seal, silencer...) but in the end it has turned out very well.
Cheers.
Great job so far. I have a 1995 CR250 I did three years ago.
Thanks, y'all. Looking forward to getting my decals.
Brian, great bike! Do you ride it?
Finally got it all together.
Here is Team Fabuloso 1996 style
Fabuloso trabajo!!
Well done!
If you told me a year ago I would have two 96 Hondas in the garage today I would have laughed
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