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Here are some pics to update: Bunch of parts pre/post Metal Rescue. The stuff works well, but I have some pieces that are just too much for it. If pieces are pitted it doesn't take all the rust off. The worst pieces don't look the greatest, but I haven't come across anything that isn't salvageable from a function standpoint. The caliper pistons were a little pitted on the top edge, but not enough that should cause them to leak.
Also got swingarm bushings and fork rebuild pieces in the mail today...though they don't look like what I imagined when I thought of 'fork seals' which is what I thought I ordered. Hopefully that's all I'll need and when the new springs/emulators arrive I have everything to rebuild the forks. Let me know if (based on the pics) I'm mistaken. Each pic set is before first, then after.
Last month I ordered a set of 3 float bowl drain screws and the box arrived with thee sets of intake rubbers. Duh. Different supplier, same sort of parts cross check issue.
Got the racetech stuff so started rebuilding the forks and making the mods necessary to accomodate cartridge emulators. Anyone know the best way to remove the roll pins at the top of the fork dampers?
Here are the new parts. Instructions could be clearer...going to have to call Racetech to figure out some of the details, most of it is pretty straight forward when combined with a shop manual.
Installing the emulators calls for drilling out the compression damping holes, which is straight forward. But they also call for cutting out the roll pin or some section off the top of the damper rod and that's what I'm not sure about.
My fork seals actually look really good, and they weren't leaking before taking them apart so I think I'm going to leave them. I have new ones on the way and can always replace them later. The forks aren't as complicated as I imagined they'd be.
If you are already in there, then go ahead and replace the fork seals. They may look good...but i'd hate to see you have to pull em apart again just bc the seals started leaking.
If you remove that roll pin, what do you use to hold the emulator on top of the damper rod and where does the seal go? Did R-T supply adapters that take a piston ring (seal) or solid adapters? Are they stepped to fit on that small diameter shaft or simple parallel tubes?
Depending on what they supplied the answer as to what you do next may vary. Typically the emulator sits on top of a 12mm (or so) tall piece of aluminum tube (AKA adapter) and if the damper rod has no seal, that adapter typically has a groove to take a plastic piston ring.
That adapter has to sit on top of the damper rod, so size matters here.
The center of the damper rod is open (like a tube), and the roll pin passes through cross ways. The Racetech instructions suggest removing the roll pin so that it does not restrict oil flow through the damper rod. It then recommends using locktight to hold the top of the damper rod in place.
The emulators came with the adapters that have piston rings and which sit on top of the damper rod.
There certainly seems to be a decent amount of space around the roll pin, but compared to the compression holes I drilled out, this will almost certainly be a choke point.
It is entirely possible that I'm interpreting the instructions wrong, either way, I plan to give racetech a call today.
I have never removed the roll pin, but if that top part sits on the rod without the pin, then spring pressure will hold it in place, so go ahead and press out the pin. You can use a pin punch and drift it out.
Got the first of two fork legs rebuilt this evening. After having everything apart and rereading the directions a few times it made more sense. I removed the roll pin and cut it down into 2 smaller pins. Put locktight on the threads of the top of the damper rod and screwed the top back on, then put the two pin pieces into place which now leaves the center of the rod wide open. Adapter w/ piston ring sits on top of that, then emulator and spring.
New seals too - geez those are a bitch to remove. Used a claw hammer and a rubber mallet to beat them out. Added some grease before the new ones so hopefully won't be so bad next time. Only thing left is to cut preload spacer and add oil...then repeat for the other leg.
I left the emulator with the 3 turns of preload (how it came) and sliver spring, springs are Racetech .75kg straight rate springs and I'll probably space for 20mm of preload. Any recommendations?
Tried making some cardboard seats to mock up. Still not exactly sure what I want to do. Here are 4 samples. I tried to emulate the tank lines by shining a light on the tank and tracing the profile, then made some cardboard seats for ideas. Turns out the scale was a little off...only seat 4, which was just for fun, actually looked okay. All the rest looked ridiculous when taped up.
I will work to modify them and get them closer to something I'm not ashamed of.
Seats 1 and 3 are solo seats, seat 2 is an attempt at a 2 person seat with removable cover for the passenger seat. Seat 4 is similar to the Twinline fastback #4 seat, which would be about $175 for raw metal with no upholstery. Open to suggestions.
Latest color thoughts are blacked out with stainless/chrome accents and raw steel tank and seat/tail with clear powder-coat and possibly some Yamaha tank decals clear-coated on.
Not sure what your fab skill level is but that #4 seat is about a 100x easier to make than the first three. In my opinion some variation of #4 would look the best. Make a model seat/tail out of cardboard (3 dimensional) or foam first then buy half a sheet of 18gauge sheet take paper templates from your model and give it a go.
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