Kawi2strokes.com Forum

That is what I was refering to. You can mill off the back of the cylinder, build or machine boxes or graft some on then purchase reed blocks.

For all that Rog got 26.5 rwhp per cylinder.

My kit is almost a bolt on, comes complete and with medium porting makes 28 rwhp per cylinder. And with only 3 cylinders I can take off in 4th and she hits very hard.

It all comes down to how much time and money you want to spend......

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

Thanks for that Vid Chris, its great to hear Roger's bike running on the dyno, that thing sounds really stout, especially at low rpm.

Interesting stuff! I was pointing out how good reeds are at giving back some low down grunt to a peaky motor. The porting that Roger has on his bike is to Denco specs and is very tame.

I've recently ported a motor for drag racing and so the spec required was "Lots of Power!" The porting is quite fierce, it uses the bridged inlet cyls to give more piston support and some very expensive V-Force 3 reeds. He's not put it together yet but I bet it puts out well in excess of 100rwhp. As soon as it's completed, I will post the dyno runs on here.

I think it's absolutely fascinating just how much power you can get out of a two stroke with the correct balance of modifications. I must confess that the guy that designs my pipes and port specs is the very same guy that designed the KR3 GP motor for Team Roberts and has Degree's in Pipe Thermal Dynamics and Balance. I therefore cannot claim to be a Tuning God but just good at removing metal from where I'm told to!

I'm still convinced that reeds are great for a road bike.

Can't wait!

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

I'm "old school", though there have been some very cool "updated" triples done, I just thing the "essence" of the triple is gone.

You can make a triple a total blast to ride, without huge forks and monoshocking, or a billet motor. Both which "to me" doesn't make it a triple anymore, just a "special". One could just get a TZ 250 and throw lights on it and you have a awsome bike all around.

The fun/cool part to me, is when you can "tail/pace" the newer bikes, and when you stop they can't believe you can do that on skinny tires, skinny forks and a 40 year old motor. Do it on a "special" and you get "well sure, you got modern kit"..............

"Just sayin".......

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........

I totally agree with you John. It's so easy to lose what you call the "essence" of a triple if you go too far with the mods. My project bike has a nice set of Melber mag wheels which are period upgrades and are virtually stock size apart from the rear being a little wider. (19 x 3.25 and 18 x 140) I also have the skinny 36mm forks, bars, stock tank, seat, tail & side panels. I want my bike to look as stock as possible. My motor has 38mm Mikunis & reeds and is rubber mounted.

As much as I admire some of the amazing work done by some guys on here, for me it sort of takes away something when I see mono-shocked bikes with USD forks and super wide tyres.

I really like your new look 500 and also Carlos's H2. There are plenty of other bikes that have been modernised but retain the Old School look. I suppose I'm old fashioned at heart!

I remember reading somewhere (might have been the UK Club Magazine) that it was possible to get over 60 HP per cylinder on gasoline and naturaly aspirated.
Think that works out to something around 5 HP per C.I.
Don't think that's been achieved on a 4-stroke yet including Formula 1.

Modern or not, that's kicking some serious a$$.

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There are only two types of motor sport racing:
Nitro and everything else
(Sometimes referred to as fast and slow)

Hi Jim,

that figure is not too far from the truth. It goes to show what amazing motors two-strokes are!

Hi Chris,
While I was loosely referring to the R&D efforts of Bill and Darren, I believe the sled guys might be making the biggest power.
Guy at our local track with a sled that runs low 9's with a 3-cylinder, 2-stroke with a billet case. Wonder how fast it would go with wheels instead of a rear track and skate board wheels on the skis.

Reasonaly sure that the most HP/CI is currently being made with a 2-stroke assuming gasoline / normal aspirated.
I find that amazing considering some of the major advancements for 4-strokes like 5 valves per cylinder, fuel injection, variable valve timing, completely programable ignition and fuel curves.

And inspite of all that; here we have a few dead beat drifters with some original ideas armed with bits of metal and carbon fiber. Combine that with an old 2-stroke design and some 70's reed valve designs and you guys are just making tons of power. How cool is that!
(note: I realize that McCullouch and others were using non-caged flappy fiberglass reeds well before the 70's but consider some of the early Yamaha styles much more effecient and durable)
http://cgi.ebay.com/ws/eBayISAPI.dll?Vi ... K:MEWAX:IT

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There are only two types of motor sport racing:
Nitro and everything else
(Sometimes referred to as fast and slow)

Nothing wrong with "old fashioned!" And thanks, it's great fun when guys know what they are looking at, but it's just "different".....

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Twist the throttle, tilt the horizon, and have a great time. What triples are all about...........