500 Two-Stroke Tech

Very nice indeed

Kalim wrote:Hello,

I will send steel parts for surface treatment, so I wanted to collect all of them.

I managed to remove the steel crooked hose out from the thermostat case, but there is no o-ring nor gasket doing waterproofing between the two ?
Do you think sealing is done with gluing,or just pressing ?

Now I see that the aluminum thermostat and its steel hose is only one reference. Maybe it is not supposed to be dismantled .

Did not see this one...
This is a standard press fit, usually sealed with some loctite stuff.
Could be that it is not sealed from factory but if you remove it I would glue it back in as the press fit isn`t the same anymore if you press it in twice.

Thanks for the advice !

Bonjour à tous,
I had some time to spend on the bike, so some progress are made.

In January I sent this :



And received this some weeks after:



Glad with the job, the parts are super clean.

So I could finally keep going with the reassembly.
Side stand, oil pump, kick starter, radiator and water hosing, YPVS motor, tank brackets, etc...
And the loom with all its boxes.

Really happy with the progress .

looks great!

Bonjour à tous,

Some good progress recently.
The loom is tested and works ok. But dIdn't check the ignition part yet.
The YVPS motor is alive and runs properly.

There is light on the dash!


All cables and small bits are also assembled.
Clutch works smooth.

I finished the last magnesium housing, and fixed it to the engine.
I'm happy with the way it looks.

The carb service kits are on their way, and I'll be ready to fire it up !

That swingarm looks great, like it's always been there.

qui, tres bien
hope that's right

BigGuy wrote: ↑Fri May 03, 2019 10:21 pm That swingarm looks great, like it's always been there.

Thanks, yes I like it very much. It fits the original style of the standard frame.

Hi all,

The four carbs are rebuilt, and the float levels are done. Almost there to fire it up !
But I shall be patient, I have many professionnal trips in the next 2 months. Maybe she will smoke in July.





And I received the rear seat unti from Pferrer.
This is super good quality. Good thickness, good finish too, no deformation, it is really well done.
Great packaging too.



Blank installation, to check. Fits well .
The rear cans are too long, I'll have to wide cut the rear, and that was my plan anyway.



A gif to see if the cut I plan to do will actualy look like what I want (©Vin).

Hi
cracking looking bike, been watching this for a while, going to look a beaut when complete.
I have used the same seat unit which I have also cut down but not as much as you are planning to do. As you said excellent quality.
Rich

https://photobucket.com/gallery/user/ri ... anBn/?ref=

Thanks Rich. I'm still wondering about the seat unit cut, maybe it is too much.

Yours looks great !

looking good

Hi all, already 5 years since I restarted this project from scratch !

Here are the latest progress.

In order to finally run the engine I filled in water and oil.
I have a water leak at the hard plastic hose that connects the two lower cylinders. I believe the two o'ring are crushed, need to get new ones.


And I also have a very small leak (seepage is the correct word ?) at the gearbox oil pump cover.
It is very small, but it's here .
I made an accelerated video:
https://photos.app.goo.gl/2UoYfVsDyW3iaLpC8

It releases a drop every hour or so.
I know the sprocket cover is not fitted here, but when I tighten it it doesn't help, the leak is still here.
This oil pump cover was actually damaged long before I had the bike. The drain was ripped off, and a piece of aluminum was welded flat.



That made me think the cover might be twisted, and the contact area of the cover may not be flat anymore.
So I controlled it on a marble, and indeed it is not flat.



In fact only the section where the left bolt lays on seems twisted.
I'll make a last try with tightening first the top and bottom bolts, so I don't have the constraint from the not flat area, then tighten the left one and finally the one with the sprocket cover.
If it doesn't work I'll find a way to get it machined flat.

I'm kind of stuck with the engine now, so I decided to work on the seat unit received from Pferrer in Germany.
I want something thin, but would cover completely the chambers. Vin's seat unit was an inspiration and the YZR 91 too.



I found hard to imagine the result even when sketching on the actual unit, but I took the plunge.
Cut both sides, I'm happy with the symetry left/right.



I took my time for the sketch for the silencers, measuring, again and again not to screw everything up with a bad jigsaw shot.



But I think I managed it not so bad ! It sticks the right shape.



Here is the final result.




Now of course I need to finish all edges, sand and use finish mastic.

Ho and I received a battery eliminator from Nick in Greece: http://www.2t-racelab.com/p/online-store.html
This is very good diy stuff. I do recommend it.


And I have a question for you guys about the front and rear sprocket ratio.
I have a 48 teeth rear sprocket fitted on my R6 wheel (hence 17").

What would you recommend for the front ? It has to be big enough to ensure clearance for the bigger swinger I guess ?
I also read an R1 sprocket will fit, should I pick one of the older ones from 98-2000 ?
Thanks for your advices !