HorsePower

[Timati]

I'd love to help. Always willing to work on a two-stroke (never pass up a chance at learning something you don't already know!)

What sort of a rebuild are you planning? Just new pistons etc? If so, do you know what size the current pistons are? If they're already oversize (which would mean it'd had at least one rebuild in the past) you need new pistons that are oversize too.

+rep hehe.

Well looking at replacing the piston rings and base gaskets. Not sure if the pistons need replacing. As for the current piston sizes, I'm not entirely sure as far as I'm aware, it hasn't had a rebuild. I could be wrong. What's your schedule like? Thinking could have a look at it sometime this week??

[PirateJafa]

Well looking at replacing the piston rings and base gaskets. Not sure if the pistons need replacing. As for the current piston sizes, I'm not entirely sure as far as I'm aware, it hasn't had a rebuild. I could be wrong. What's your schedule like? Thinking could have a look at it sometime this week??

Free just about any day before 3pm.

[PirateJafa]

Oops except Friday. Heading south so that is out.

[BANZAI]

do you want my anime sticker? I can ask for custom RS decals

My GNX250R have 25% extra horsepower thanks to the colouring and my suzuki girl sticker hehehe

[Slyer]

do you want my anime sticker? I can ask for custom RS decals

My GNX250R have 25% extra horsepower thanks to the colouring and my suzuki girl sticker hehehe

Just needs more cylinders.

[aewilliam]

Well looking at replacing the piston rings and base gaskets. Not sure if the pistons need replacing. As for the current piston sizes, I'm not entirely sure as far as I'm aware, it hasn't had a rebuild. I could be wrong. What's your schedule like? Thinking could have a look at it sometime this week??

Oohooh! do i hear a bit of time spent on RS250 analysis? May i jump in with mine as well? puhleeeeease?!?!

21k km and is able hit 150kmh as consistently and predictably as the Warriors win games.
At the mo, its sitting at Motohaus Western Springs...
And there it sits...
And sits...

[motorbyclist]

Thanks. Can't find too many people who seem to want to work on a RS250...

i'm keen, just don't have the time


though my exam timetable means i'll be keen as soon as lectures end

25th october

What chicken strips?? And aren't 2 stokers designed to output twice the power ratio e.g. 250cc is equivalent to say 600cc??

last i saw that bike had them strips


250 times two is 500

it all depends on cylinder arrangement and then there's the rest of the bike too... and then the rider

as a general rule you double the capacity (ie in single cylinder motox the 250cc 2 strokes race with 450cc four strokes, while 125cc two stroke race with 250cc four stroke, but in F3 class the four strokes have 400cc 4 cyl racing with 650cc twins), but things keep skewing as the four strokes get better while two stroke development grinds to a halt (damn hippies)

so performance wise your RS250 is on par with the VFR400 - remember though it's a different sort of power

the RS being much lighter with no engine brake, and all the power at the top end
vs. the VFR - much heavier but low centre of gravity and useable power right through the rev range

either way those two bikes are considered the best machines under 600cc ever built


I think your priority should be a rebuild, and maybe chuck some bolt on performance mods in there while we're at it

but be careful - often performance comes at the cost of long term reliability

[Timati]

Oohooh! do i hear a bit of time spent on RS250 analysis? May i jump in with mine as well? puhleeeeease?!?!

21k km and is able hit 150kmh as consistently and predictably as the Warriors win games.
At the mo, its sitting at Motohaus Western Springs...
And there it sits...
And sits...

Why the hell is it just sitting there?

i'm keen, just don't have the time


though my exam timetable means i'll be keen as soon as lectures end

25th october



last i saw that bike had them strips


250 times two is 500

it all depends on cylinder arrangement and then there's the rest of the bike too... and then the rider

as a general rule you double the capacity (ie in single cylinder motox the 250cc 2 strokes race with 450cc four strokes, while 125cc two stroke race with 250cc four stroke, but in F3 class the four strokes have 400cc 4 cyl racing with 650cc twins), but things keep skewing as the four strokes get better while two stroke development grinds to a halt (damn hippies)

so performance wise your RS250 is on par with the VFR400 - remember though it's a different sort of power

the RS being much lighter with no engine brake, and all the power at the top end
vs. the VFR - much heavier but low centre of gravity and useable power right through the rev range

either way those two bikes are considered the best machines under 600cc ever built


I think your priority should be a rebuild, and maybe chuck some bolt on performance mods in there while we're at it

but be careful - often performance comes at the cost of long term reliability

25th October sounds good. Am going to try and source the parts (piston rings and base gaskets) today or at least hopefully this week. Rebuilding it definitely a priority. Bolting on performance bolts would be welcome :-)

[nodrog:Me]

http://www.apriliaforum.com/forums/f...splay.php?f=19

[bomma]

riding with small bikes seems to add about 90bhp to my bike.......

[avgas]

ok you have an RS250 and still have hp issues????
just do a full rebuild, and pay the extra for a set of iridium plugs.
as long as your compression is good the bike should be honking around the 230+kph area.
Also ride fast - if you don't your engine will hate you.
RS250 is not a commuter.

[Timati]

ok you have an RS250 and still have hp issues????
just do a full rebuild, and pay the extra for a set of iridium plugs.
as long as your compression is good the bike should be honking around the 230+kph area.
Also ride fast - if you don't your engine will hate you.
RS250 is not a commuter.

I wouldn't say I have HP issues however would be nice to get a little more performance out of it at the lower revs. Already have a set of iridium plugs. Now when you say a full rebuild, what do you mean exactly? Tend to average around 140 kph with the occasional 180 and 200.

[Zim_Invader]

my bike goes fine thanks

... for now....(dunm dunm dunmm!!)
(anybody need new spark plugs?... ooh, wait. who want's some braided lines!!!) haha... jsut remember. if u bin it (again), it definately wasn't becoz we disconnected the brakes

[Ixion]

Given that the RS250 is probably one of the half dozen fastest bikes of ANY size, point to point, on the roads (and on some roads, the fastest), one feels that the OP must either be an enormously experienced rider with balls the size of watermelons, or does not understand how a two stroke must be ridden.

[Timati]

Given that the RS250 is probably one of the half dozen fastest bikes of ANY size, point to point, on the roads (and on some roads, the fastest), one feels that the OP must either be an enormously experienced rider with balls the size of watermelons, or does not understand how a two stroke must be ridden.

I wouldn't say I'm an enormously experienced rider but don't mind pushing the limits if I have to (and within reason) but found that am always losing valuable ground when dropping gears and slowing down around corners and want to ride fast out of them...unless I'm doing it completely wrong...