[oscarthecat]

Any one know a easy engine swap for a rs 125 ? or got a list of all the ones that can fit in a frame ? so i can keep my eye open when shopping also might want to look at dream lists that would work on it and make it better then what it is now thanks guys

 

[monty16v]

Rotax 257
250 single cylinder
pretty straightforward swap

 

[pego30]

500 ktm

 

[parksie]

Ktm lc4 640

 

[parksie]

If you want to keep it Aprilia/Rotax Pegaso 650 motor fits quite nicely too.

 

[monty16v]

If you want to keep it Aprilia/Rotax Pegaso 650 motor fits quite nicely too.

Lazy big slug, better off with a 250
the 650s have the oil inside the frame as well

 

[parksie]

Lazy big slug, better off with a 250
the 650s have the oil inside the frame as well

I know they were used in supermono, does the motor differ in tune between the Aprilia/BMW/husaberg it's used in?

Obvs better to keep it 2-stroke, just throwing some right hand sprocket options out there

 

[monty16v]

I know they were used in supermono, does the motor differ in tune between the Aprilia/BMW/husaberg it's used in?

Obvs better to keep it 2-stroke, just throwing some right hand sprocket options out there

mostly the head, the aprilia has 5 valves
no extra power though
I dont think they even make 50bhp
and you would need to fabricate somewhere to hold the engine oil

 

[parksie]

mostly the head, the aprilia has 5 valves
no extra power though
I dont think they even make 50bhp
and you would need to fabricate somewhere to hold the engine oil

Imagine they're a heavier lump than a 257 as well

 

[pego30]

500 ktm

 

[rs125plus]

the 700cc zabel engine (same as used in some maico's) is for sidecar racing
and produces 110 bhp - and the engine and ignition weigh 28kg

here is my bike





slowly evolving - fitting the engine is easy - better suspension costly

here is what the germans have done

 

[oscarthecat]

Wow shame about the exhaust thats really blown the looks lol

 

[monty16v]

Im sure the heat from that exhaust is comfortable on the leg lol

 

[rs125plus]

I think there might be a bit of 'mines bigger than yours'' in that pipe

the ones for the sidecar are long but a lot smaller diameter.......



some nice fabrication there - you would need insulation on your leathers.....

 

[pego30]

http://www.videobash.com/video_show/chainsaw-bike-with-expansion-chamber-520309

 

[rs125plus]

if you buy an engine - buy it complete with carbs and ignition...etc

if you don't it can cost a lot to get the right items together.

also - see the engine running (if possible) most bikes get broken because the
engine has blown or a fault preventing proper use. I speak from having bought
an engine that 'just needed a rebuild' - pistons and rings for a Zabel are about
£900 ! only one supplier - only a few thousand made etc etc - this all screwed up
the budget for carbon wheels !

 

[pego30]

is that an rsa frame ?

 

[msbg]

500 ktm

Hi there
could you answer some questions for me regarding the KTM500 into RS125frame please? I have one that basically shakes apart bolt by bolt when its going and was wondering if you had similar issues.