Author Topic: FT500 Vintage racer  (Read 2481 times)

FT500R

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Re: FT500 Vintage racer
« Reply #25 on: September 17, 2020, 10:06:17 am »
Got a new front fairing.
Made the fairing stay on the front already, have to tweak it a bit more but it is already pretty sturdy.
Will add some brackets to the sides to keep them in the correct position and from flapping around.
Also welded my linkpipe. Have to add a bracket to fix the linkpipe to the frame on the spot where the exhaust normally mounts and have to add a muffler hanger.

The windscreen on the pictures is one I had lying around. I will not use this one but it was more to get an idea of the looks.

hellblom

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Re: FT500 Vintage racer
« Reply #26 on: September 21, 2020, 03:05:58 am »
What size tires do you have on this mr FT500?

FT500R

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Re: FT500 Vintage racer
« Reply #27 on: September 21, 2020, 07:09:28 am »
110/70/17 front
140/70/17 rear

FT500R

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Re: FT500 Vintage racer
« Reply #28 on: September 28, 2020, 04:01:50 am »
I've welded supports for the fairing so it is installed.
I made one support from the neck of the frame forward and 2 small tabs on the sides of the frame.

My welding isn't great but it's solid and when I will prepare for final painting of the frame I can grind the ugly bits down a bit.

I am very satisfied with the position and sturdiness of the fairing. It really hugs the bike nice and tight.


murdo

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Re: FT500 Vintage racer
« Reply #29 on: September 28, 2020, 04:08:45 am »
Looking good.  :)

hellblom

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Re: FT500 Vintage racer
« Reply #30 on: September 28, 2020, 02:00:07 pm »
Well on the way! Looks good.

FT500R

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Re: FT500 Vintage racer
« Reply #31 on: October 13, 2020, 03:11:29 am »
Refurbished the front forks this weekend.
Not the first one I did and since this is not a cartridge style fork it was really easy.
Replaced all the seals and slider bushings as the seals were leaking and the bushings completely worn.
I removed the whole anti-dive system as this will lockup the forks when braking on a bumpy road (not something you want when riding on street circuits)

Also drilled some extra holes in the damping rods to prepare for cartridge emulators. I have gone for the YSS PD valves instead of the more well known racetech gold valves. Primarily because the YSS are actually obtainable in Europe and they are a lot cheaper.
I'll be running 15wt fork oil and will have to shorten the spring or the spacer to accomodate for the PD valve. Will post more on that whenever I get them.

The postal company has lost my package with the valves though but at least everything is prepared and they should be a quick drop in.
« Last Edit: October 13, 2020, 03:28:22 am by FT500R »

FT500R

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Re: FT500 Vintage racer
« Reply #32 on: October 16, 2020, 03:07:21 pm »
Fully welded the exhaust and slapped some cheap heat resistant paint on it. (I also drilled some holes in the header to weld in the inner tubes that got loose, seems to have worked)
After that I got some new sticky stuff for the FT.
I went with Bridgestone RS10s. Read a lot of good reviews about them, they were pretty affordable and were available as a set in the sizes I wanted. Really happy with them. I got 110/70/17 for the front and 140/70/17 for the rear.

For the front forks I came across these things:

These fit on the forks instead of the current caps. I would loose the air valves and with that the possibility to pressurize the forks but would gain pre-load adjustment. Anyone any experience with something similar?

murdo

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Re: FT500 Vintage racer
« Reply #33 on: October 16, 2020, 04:15:30 pm »
I used the adjustable top caps on one of my CBR250's and found they made a noticable difference.

FT500R

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Re: FT500 Vintage racer
« Reply #34 on: October 26, 2020, 11:25:06 am »
Got the PD-valves in the mail this weekend and installed them.
Really clever little things.
You put them in your forks between the damper rod and the spring.
The spring preload of the little valve controlles the amount of oil that can flow when the forks compress, with that it controlles the compression damping.
Rebound is still controlled with the oil viscoscity.
I've set the valves on 3 turns preload (out of 7) for now. The forks still feel a bit soft but this could also be due to the relatively weak standard fork springs.
I had to shorten the fork spacer with 14mm (thickness of the PD-valves) to keep normal pre-load on the fork springs.
I'll keep them like this for now, changing the pre-load on the PD-valves is relatively easy so I can dail them in further when I get to test ride the bike a bit (you do have to 'open up' the forks by removing the top cap, spacer and springs).


patrino

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Re: FT500 Vintage racer
« Reply #35 on: November 04, 2020, 06:55:44 pm »
Looking good - thanks for the update!

I reckon you'll like the cartridge emulators.  I'm a big fan - for the last ten years or so I've been running them (RaceTech's version) in all my vintage bikes.

You may already have figured this, but in case you need to adjust the emulators, a tool like this is helpful to grab them from the top of the damping rod:  https://www.homedepot.com/p/GrabEasy-24-in-Flexible-4-Claw-Pick-Up-Tool-Jewelry-Retriever-Clog-Remover-Drain-Snake-in-Chrome-PF0401/202505170

FT500R

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Re: FT500 Vintage racer
« Reply #36 on: November 06, 2020, 04:28:46 am »
Thanks.
I indeed used a similar tool. Works like a charm and you don't have to drop the valves in or turn the forks upside down to get them out.

I just ordered new shocks and progressive fork springs so the whole suspension should be sorted.

FT500R

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Re: FT500 Vintage racer
« Reply #37 on: November 12, 2020, 08:05:05 am »
Christmas was early this year (or Sinterklaas which we celebrate in the Netherlands).
Just got my Hagon shocks and fork springs.
I went to the importer of Hagon shocks here in the Netherlands to discuss which type would be best for my situation and instead of the more expensive adjustable 2810 series they actually recommended the 'standard' shocks as these have progressive damping.
This progressive damping various according to the sharpness of the shocks and with that would be more optimal than a set damping that will always dampen the same way.
I did get springs specifically for my own weight, the bike and the racing I will be doing with it.
Together with the progressive fork springs and the YSS PD-valves this should give a much improved ride.

Hope to install everything this weekend.

FT500R

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Re: FT500 Vintage racer
« Reply #38 on: November 15, 2020, 05:06:52 am »
When racing I have to remove the side and center stand, which means that parking the bike is a bit difficult.
To make it a lot easier to prop the bike up I welded 2 long nuts on the rear swing arm to fit paddock stand bobbins.

The Hagon shocks I bought are a bit longer than the orignals (was recommended this by someone who races FT500s). The bike looks pretty sweet with the shocks installed.
I also made a muffler support from a strip of aluminium. Might add some speedholes in it to add lightness ;)

FT500R

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Re: FT500 Vintage racer
« Reply #39 on: November 17, 2020, 09:46:43 am »
Fitted the hagon progressive fork springs today.
These replace the original spring, washer and spacer.
Problem was that I had shortened the spacer to make room for the PD-valves (about 20mm).
I can't just shorten the progressive springs so I fitted them as is, I do have quite a lot of spring pre-load now (about 37mm) but statically the forks feel great and not harsh at all.

hellblom

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Re: FT500 Vintage racer
« Reply #40 on: November 22, 2020, 12:44:02 pm »
Nice, which model of the progressive springs was it?