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The next job to do was the front end.
Once again the RGV250 was the donor bike. I had a set of upside down forks from
the VJ22 model. I also had al the braking system, wheel, mudguard. In fact it
was the whole front end. All of it is in pretty good condition, just a bit of
TLC required to have looking like new again.
The first problems came when I replaced
the bearings. I was expecting the YPVS to have parallel bearings, but guess what
it already had tapered ones. Still, wouldn't hurt to change them. So I ordered
the direct replacement bearings from Yamaha. They arrived two days later, and
guess what? Yep that's right, they did not fit. I went back to the dealership
that had sold me the bearings and was assured that they were the correct
bearings for the LC. I explained again that it was a Brazilian bike and not a
Japanese one. "Same bearings sir" was the reply. I left the bearings there, went
home, put the bike in my van and took it back to the dealership. "Mmmm see what
you mean sir, they won't fit will they"
He checked again, same bearings as
before and no alternatives! Anyway got my money back and left to have a think.
Finally wrote the bearing part numbers
down, phoned a local bearing supplier, asked if they could help. "Yep, got those
on the shelf sir". Took the bike again to be safe. The guy measured the headstock
and the fork spindle. "These are the right ones" I bought them there and then.
What a surprise, only 25% of the price Yamaha had charged me and they fitted. At
last I could get on with the front end now.
The outer bearing surfaces that were in
the headstock came out easily. But as usual, the inner surface that sits at the
bottom of the headstock spindle had to be ground through and then levered off.
Not a problem, you just have to be careful with the grinder and it takes a bit
more time.
The information that I had been given
about the fitting of the RGV front end was that a 5mm alloy spacer to fit under
the bottom bearing had to be made to give the required clearance for the bottom
fork clamp. I made the spacer and fitted it under the bottom bearing as
directed. When I bolted the whole thing together I found that the spacer was not
required. It seems that as well as using different bearings, the Brazilians had
also lengthened the headstock by, yes you've guessed it, 5mm. I cut off the
spacer, tapped the bearing down and refitted. Perfect!

Unfortunately I do not have any
pictures of the fitting process, but I do have this picture of the bike with the
rear suspension, front forks and the tank, (with all the paint removed) this
gives you a good idea of how the whole thing is going to look. The bike looks
far more substantial with the RGV 250 running gear fitted. It beefs up the
front and rear of the chassis and makes it look far more modern and purposeful.
You can also see the subframe for the
Aprilia RS250 seat unit attached to the YPVS frame. This unit is bolted in place
so is removable if required.
The next construction to deal with
was the Aprilia RS250 subframe and seat unit. You have already seen the
subframe in place on the previous picture. In this section I will try and
explain how its position was decided upon and how it was fixed in place.

The subframe was held in place with G cramps until the desired angle was
achieved. The bodywork was then loosely hung on the subframe to try and get
a visual effect of what it was going to look like.
I had to cut 20mm off the bottom
legs of the subframe as the angle was too steep and looked overpowering. The
tube was then re-crushed, new holes drilled and then offered up again. This
time the angle was much more acceptable and although some people might find
it a little high, I tend to like that look, so that's how it stayed.
I made the mounting brackets from
5mm steel and welded them to the YPVS frame in the required positions. The
positions of these brackets is critical as incorrect positioning will leave
the subrame at an angle to the rear of the bike and would look terrible when
viewed from behind. So great care had to be taken at this point to make sure
all of the mounting positions were precise.

Once the brackets had been fixed to the
YPVS frame I could set about altering the plastic seat unit so that it fitted
around the original frame in an original looking manner.
This involves removing small amounts of
the plastic with a dremmel and an abrasive wheel until the desired effect was
achieved. It took quite a while removing a tiny piece at a time, but better this
than making a mess and having to source another seat unit, especially as I had
been lucky enough to come across a carbon effect unit.
The following pictures are all of the bike
at this stage. It should give you an idea of the final positioning of the
bodywork and RGV components.
The clock mount that I made and is in
these pictures was binned in favour of a TZR250 unit which looks far better than
the rubbish seen here!


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