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Get those last bits sorted! We need to see pics and vids!
Only thing i'm not 100% are the graphics...could be a better option to get some printed on clear, to match the plastic colour 100%...but then again you are riding it so doesn't really matter. Will probably look better in decent lighting
"Figure out why the rear brake won't bleed through"
When I change out brake lines, or ever start with a dry system, I have a repurposed syringe I use to fill the brake system. I just connect it to the caliper and fill the system from the bottom until bubbles stop popping at the reservoir. Then I bleed the normal old school way to get all the air out. If you try and fill the system from the top with M/C, it will take for ever, or sometimes not happen at all(especially on a rear system that is mostly horizontal). A trick I learned building supermoto bikes for 5 years. Hope that's helpful.
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I like the idea of filling it from reverse, as you said, rear systems are a bitch to bleed!! I need to get some decent syringe's! The only one I have is from a fork oil hight kit and it's crap! The seal in it reacts with oil and swells so it's completely and utely useless!!
Stevie
I use one of these on all my hydraulic brakes. Takes seconds. Works unbelievably well
I took another look through this thread last night- good god man!! This is build is truly on another level. It's been a 2 year process, so I guess it kind creeps up on you, but take a look at it all at once and the amount of work you have done on this bike is immense. I was blown away by the CR250 build blackdiamond (I think that's the name) has been posting in the moto section, but this bike gives him a run for his money(or maybe his to yours!). I mean EVERY single bolt being Ti- insanity. The best part is, you plan to ride the thing! BBRRAAPP!!!!
I've been following Black-diamonds build. WOW!! That is one epic thread! Thank you for the comparison!!
Stevie
thanks..
J
Stevie
Each change has brough with it a new issue that had to be resolved. Some I new were coming, the brake pedal for instance. I new it would be complete one off.. but something as simple as a chain roller I didn't see coming!
The 87 swing arm is a little chunkier than the 86. So much so that the lower chain roller wouldnt fit. I could have just made a small roller, but it would be really small.... 12-14mm....
So, i made up this little slipper pad. It bolts up to the original roller mount and it sits over the rear frame tube. I made a Titanium sleeve/spacer and obvioulsy the bolt is Ti as well.
Kinda chuffed with how its turned out!!
The lower lock nut and bump stop base were a bit scabby. I made these out of stainless. I didn't have any 54mm Titanium. It's not a size of bar we would use so buying a short length for just a washer would be very expensive. Also, Titanium needs special Taps, which are agin very expensive. So Stainless it was!
The rebound adjuster was really chewed out. So I made one!.. in Titianum! I had to take the old one apart (hence why the top is machined off...) so I could see how it worked and what was inside. It's just a ball bearing, a spring and an o-ring to seal it. The top is closed off by a washer and then edges of the outer are peened over to hold it all in place. It's quite simple really. It's basically a mini fork adjuster! I replaced the o-ring and I used the ball bearing and spring out of the old unit.
It works perfectly, with a nice, satisfying "click" with every 1/4 turn!
I've also got a new seal head assembly, a NOS bump stop, damper piston o-ring and guide bush to go inside.
She might even get fired up this weekend!!.. if the kicker arrives!!
Stevie
Stevie
I've never embeded a video before... and I've obviously done it wrong!!
Pit Row
Nice work, i admire.
There have been lots of little fiddly bits that I needed to finish off.
The first one of these was the kick starter... I'd tried a couple of different levers, KX 250, 2001 CR250... nothing really fitted... but I finally settled on a 2001 YZ kicker. It's the perfect shape, very similar to the factory lever.... BUT as it's off a YZ, fitting it wasnt quite simple....
The splines on the YZ knuckle are much finer than the CR and the detent is in different place on the pivot boss.
So I had to make a new knuckle... well I ended up making 3 in total. The first one looked spot on, but the spilines were in the wrong place so when it was mounted it was either to too far back and touching the frame, or much 2 far forward...
I'd also positioned the detent in the same place as on the original YZ knuckle. So the lever stopped facing straight forward. It really should have been moved round to when "home" it pointed in a little.
I made the next one as a proper "test" in alloy, and followed it along side at each stage with one in titanium. I moved the splines round and changed the angles of the stop faces and the detent hole.
This is actually the very first "wrong" knuckle. but it looks pretty cool! The correct one looks almost identical.
I have since swapped out the OEM retainer bolt for a titanium one.
Fitted to the bike. I had to take a little material off the outer face of the lever. As just before the lever hit the stop (the footpeg) it touched the clutch case, the "lump" for the bolt to go through directly bellow it. Now it clears perfectly.
Looks like it was made for it!!
I also had to figure out a brake pedal return spring. I didn't like the way i'd first made the mount for it on my brake pedal, so I removed it. I ended up using a small stainless steel compession spring and I made up a titanium retining washer than just seats inside the sping and also over the top of the clevis. It's simple, tidy and it works! I know it isn't a new or "original" idea but I don't think theres any fitments for old EVO bike!! I'm having some more springs made up so I can offer it to others.
I didn't have the retaining washer and split pin fitted for the pictures.
Bump stop, damper ring seals and bushes, a new bladder from Rach Tech.
I also made some new spring pre-load adjusters. I wasn't happy with the first pair I made. These are much better!
KAIS did an awsome job of assembling the shock for me. They also re-valved it for me.
This makes me happy!! It looks way better than I thought it would!
Frank at EVO MX has sorted out the decals for us ready for the Vets MXDN this coming weekend. Frank is a long time friend and sponsor of Todd Dehoop, so he came through and got all of Todd's other sponsors on there along with our own!
It looks like a proper race bike now!!
Catch you for a beer at farleigh
I am one of many, many who love to have been able to see this build. Thank you sir -- or, "good on you, bruv"!
Right on, Stevie. Makes my '86 project small beer and I am glad for it.
P.S. Show this off in the bike check section!
Post a reply to: 1986 CR 250 RC project/rep/build up.. IT'S FINISHED!!!