RGV250 rebuild?

[F5 Dave]

A mate just got VJ23 crank & top end parts & unrestricted CDI etc from Aus spares chap, but he was a tickle slow to respond & not super friendly despite it being a $2k+ order. People don't want to stay in business sometimes, but his prices are keen.

[NAR RG500]

I have painted more expansion chambers than most, and highly recommend POR15 for the job. Have run it on race bikes and even then it still stays on.

I saw your bike in a the Yamaha shop in CHCH over Christmas, must have been just before you bought it.

For de-carboning them, if you don't have gas then light a fire in a brazier or even just an open one, not too hot though, get the pipe burning then compressed air down the pipe keeps it burning real good when it's hot, all falls out, job done.

Then take them to the sand blaster, they will only need a light blast, then POR15 straight on, job done

Can send you pics of completed ones if you like.

Cheers

[Asher]

I have painted more expansion chambers than most, and highly recommend POR15 for the job. Have run it on race bikes and even then it still stays on.

I saw your bike in a the Yamaha shop in CHCH over Christmas, must have been just before you bought it.

For de-carboning them, if you don't have gas then light a fire in a brazier or even just an open one, not too hot though, get the pipe burning then compressed air down the pipe keeps it burning real good when it's hot, all falls out, job done.

Then take them to the sand blaster, they will only need a light blast, then POR15 straight on, job done

Can send you pics of completed ones if you like.

Cheers

Do i need to get the flames into the exhausts or will heating it from the outside in be enough?

[NAR RG500]

Put them entry end down and try to get a bit of flame in there but heat is the main thing, don't get way too hot and distort them though.

Once the carbon is hot enough is just keeps burning on it's own.

[Asher]

Put them entry end down and try to get a bit of flame in there but heat is the main thing, don't get way too hot and distort them though.

Once the carbon is hot enough is just keeps burning on it's own.

Thanks, i will burn a bit of garden rubbish this weekend and put them on that

[F5 Dave]

Your neighbours will love you.

I used to do any burning at night so no one would know.


POR15 in what format do you use? Are you brushing it on?? Never seen a spray can of it & quick google didn't pick up much.

[Asher]

Your neighbours will love you.

I used to do any burning at night so no one would know.


POR15 in what format do you use? Are you brushing it on?? Never seen a spray can of it & quick google didn't pick up much.

The joys of living rural.
The site said you had to add thinners to be able to spray it

[NAR RG500]

Your neighbours will love you.

I used to do any burning at night so no one would know.


POR15 in what format do you use? Are you brushing it on?? Never seen a spray can of it & quick google didn't pick up much.

http://www.por15.com/BLACK-VELVET/productinfo/BVH/

Spray it for sure, it doesn't come in a spray can though, a cheap gun and small compressor will do the job if that's all you have, 250mls will do 4-6 RGV pipes depending how good you are with pressure control and getting it all onto the job rather than wasting it into the atmosphere, I also leave it for two days then bake it with a heat gun.

Fantastic product, would recommend to anyone.

[imdying]

Yeah, big fan of that paint too

[NAR RG500]

10 to 15 percent general purpose thinners and you are away, worked out I have done a total of 15 two stroke pipes with it and various four stroke exhausts also.

[F5 Dave]

yeah I'm just lazy when it comes to cleaning guns. painted a 2T top end with some specialist Manifold stuff, but only cause I couldn't get PJ1 in right colour. Hope gun is still ok, but for some reason I clean & clean & I hate it.

[Asher]

So i just realized i have always assumed the bike is unrestricted, i had never really checked.

According to the rgv site "German model, opens the pilot air valve between 2k-6k rpm, the pre-ignition and the switching of the main air solenoid valves is the same as the 22d30." with the 22d30 being un-restricted.

All good so far but a little strange since its a jap import.

The frame number means it should have a 22d30 SPAC and Mikuni 30mm carbs, i checked the carbs but couldnt find any markings saying the size.
What part of the carb do i need to measure?


Is this a restrictor on the exhaust?

I have never been above 190kmh indicated while the top speed should be around 210kmh. What does that suggest?

Edit: turns out the jap bikes have a short 6th gear that tops out at 181 is that the same as the gearbox i got off you Imdying? or are all of the gears slightly shorter?

Editx2: inlet for the carb looked to be around 30mm with the oulet 36mm
Sounds like my wish list is growing

[Asher]

Did some more work on the bike today.
Burned some rubbish and threw the expansion cambers on top to de-coke them:

Seemed to work and quite a bit of carbon came out.

Stripped the bike down further and started cleaning some of the oil off it:


But i found an un registered rgv on trademe and if i find it has quite a few parts i want i might make an offer on it

[ducatilover]

I like where this is going Neat bike

[Asher]

So i brought another RGV today with all the parts ive been looking for to de-restrict the one i already have.
So this build thread will start picking up as i will be wanting to get back on the road asap.