Putting a different motor in a frame?

[kevfromcoro]

Just make sure you line the front and back sproket up within a knats cock.
otherwise you will be chomping through chains....
as for the rest of it .
just blolt it in

[glice]

The RG250 frame is aluminium, and being a two stroke twin, the upper area is alot more cramped than a deltabox frame designed for a four cylinder four stroke. Also is it the RG250 rolling chassis you are bidding on, on Trade Me? The 16" front wheel isnt ideal either, may struggle to find some decent rubber.

Yea that was the one, but I've missed out on it. unless the guy who won doesnt come through.
To be honest, it was just an idea to see what was available.

I'm pretty sure the frame is straight. it was in a big front end crash, so I have to put new forks, etc on.

[Kendog]

The RG250 frame is aluminium, and being a two stroke twin, the upper area is alot more cramped than a deltabox frame designed for a four cylinder four stroke. Also is it the RG250 rolling chassis you are bidding on, on Trade Me? The 16" front wheel isnt ideal either, may struggle to find some decent rubber.

I would agree with this.
We mounted a Loncin into my RG250 frame, had to chop the bottom of the fuel tank out to clear the carb.
I am not a fan of my 16 front wheel either

[Skunk]

I am not a fan of my 16 front wheel either

Harden The Fuck Up

[Kendog]

Harden The Fuck Up

Take my bike for a ride

[Skunk]

Take my bike for a ride

No. Too many strokes...

[koba]

I would agree with this.
We mounted a Loncin into my RG250 frame, had to chop the bottom of the fuel tank out to clear the carb.
I am not a fan of my 16 front wheel either

Agreed also, I have a 16 incher on the VFR and its not the size of the instument thats the problem its the quality of rubber available to wrap around it

[Trudes]

No. Too many strokes...

[glice]

Agreed also, I have a 16 incher on the VFR and its not the size of the instument thats the problem its the quality of rubber available to wrap around it

Yea I've just got myself an rg250 race bike, and I'm having trouble finding decent tyres. What do you run on the VFR?.
If missed out on the frame anyways, Cheers for the help everyone. Who knows I might find something else.

[koba]

Yea I've just got myself an rg250 race bike, and I'm having trouble finding decent tyres. What do you run on the VFR?.
If missed out on the frame anyways, Cheers for the help everyone. Who knows I might find something else.

Always a difficult question...

The narrow rims limit the tyres to whats available in those sizes.

Mine are 16/100/? oin the front and 18/130/? on the back.

There are quite alot of tyres available for the rear but the front it a real prick.

I use Pirelli Sport Deamons and they seem to work really quite well.

Other Tyres that MAY be available in your sizes are:
Avon Road Rider
Metzeler Lasertec
Michelin Pilot Activ
Bridgestone BT-45 (These are also quite good, I found them to last better than the pirellis but seem a little less grippy)
Dunlop GT501
IRC RX-01 (really good value for $ but not avail for 16 inch front)

The Sport Deamons seem good enough for the bike and do well in magazine write ups. I will keep buying them unless somthing comes along that looks like it may be better.

Now the obvious thing to do would be to change the rims to suit modern rubber sizes but there is a catch!

These odd tyre sizes are crossply tyres, which aren't as stiff as a modern radial, they work better on shitty old 1980's suspension so if you were to change rims to get new rubber it might not work quite as well as one would hope.
I tried a 17inch/120 supercorsa stretched over an NSR 100 wide rim on my VFR and it was sketchy as fuck and no-where near as good as the stock setup.

If you are going racing and gettting serious enough to want really good rubber I think (Havn't got that far yet myself)a full suspension, rim and tyre upgrade is probably worth looking at, it can also be done keeping to pre '89 stuff for posties.

[glice]

Always a difficult question...

The narrow rims limit the tyres to whats available in those sizes.

Mine are 16/100/? oin the front and 18/130/? on the back.

There are quite alot of tyres available for the rear but the front it a real prick.

I use Pirelli Sport Deamons and they seem to work really quite well.

Other Tyres that MAY be available in your sizes are:
Avon Road Rider
Metzeler Lasertec
Michelin Pilot Activ
Bridgestone BT-45 (These are also quite good, I found them to last better than the pirellis but seem a little less grippy)
Dunlop GT501
IRC RX-01 (really good value for $ but not avail for 16 inch front)

The Sport Deamons seem good enough for the bike and do well in magazine write ups. I will keep buying them unless somthing comes along that looks like it may be better.

Now the obvious thing to do would be to change the rims to suit modern rubber sizes but there is a catch!

These odd tyre sizes are crossply tyres, which aren't as stiff as a modern radial, they work better on shitty old 1980's suspension so if you were to change rims to get new rubber it might not work quite as well as one would hope.
I tried a 17inch/120 supercorsa stretched over an NSR 100 wide rim on my VFR and it was sketchy as fuck and no-where near as good as the stock setup.

If you are going racing and gettting serious enough to want really good rubber I think (Havn't got that far yet myself)a full suspension, rim and tyre upgrade is probably worth looking at, it can also be done keeping to pre '89 stuff for posties.

Sweet, cheers. Its got bt-45s at the moment, but I think I'll go to sports deamons when its time to change them. I had those on another bike and they seemed ok.

Yea I've got an 89 gsxr400 front end with a 120 tyre on it. I'm just not sure how I would go with the rear end.

[koba]

Sweet, cheers. Its got bt-45s at the moment, but I think I'll go to sports deamons when its time to change them. I had those on another bike and they seemed ok.

Yea I've got an 89 gsxr400 front end with a 120 tyre on it. I'm just not sure how I would go with the rear end.

Bt45 are still really good aye, theres not alot in it but yeah I do preferr the sport deamons.

As for the suspension there is only one way to find out...

[quallman1234]

There's actually heaps of 16's out there what are sticky enough for buckets, the problem is usually you have to buy em brand new unless your really lucky and spot some on tardme.
I can't justify buying a new 16 inch tyre when i have a fxr front rim with a 125 slick on it waiting for me.

My bad.

[Sketchy_Racer]

There's actually heaps of 16's out there what are sticky enough for buckets, the problem is usually you have to buy em brand new unless your really lucky and spot some on tardme.
I can't justify buying a new 16 inch tyre when i have a fxr front rim with a 125 slick on it waiting for me.

P.s Kendog, HTFU! Sketchy said your bike was a freaken awesome handler!

hmm, I don't quite remember saying those words exactly Kyle, but It it handles ok once you get your head around the weird turning in sensation the 16" front rim gives. So you are going to get that front rim and put it in your bike? You should it would be a good improvement.

[quallman1234]

hmm, I don't quite remember saying those words exactly Kyle, but It it handles ok once you get your head around the weird turning in sensation the 16" front rim gives. So you are going to get that front rim and put it in your bike? You should it would be a good improvement.

Oh whoops, sorry my bad.

Yeah hopefully if i can budge it. Still more important things to go tho.