Kawi2strokes.com Forum

For the market there after the Mikuni is way out dated. It would be interesting to try one. Is it worth almost double of what a Keihin PWK goes for, I couldn't say. The cast version is a lot cheaper than what a carb for a modern 4 stroke mx goes for.

If they could be dialed in perfect for the street, they would save spending time and money fiddling with brass...

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http://kawatriple.com/wtf/

now I understand and BTW no fuel injection triples

Lectron and E-I Blue Magnum carbs are an offshoot of the original "Lake Pow'r-Jector. The Lake didn't have a fuel bowl, nor needle/seat, or a fuel level, if the fuel valve were left on after the engine stopped, they flowed fuel right out of 'em.

The Lectron was a small leap ahead over the Lake, but, still had issues at both ends of the fuel delivery. I worked with Kel, Yamaha Jim and Sparky Edmonson on the carbs he supplied for Kenny's TZ's, and we came up with the power jet for them, which helped the top end. We still had the acceleration/off fully closed throttle issues. After we had done all we could with needle profiles, I had a billit Lectron body built, with a pilot jet circuit.

One test vehicle that we had was a clone of one Hurley had when he and I had the shop in Santa Ana, Ca. HTW's bike was an older R5 350 that we converted to a single cylinder, with radiator, so we could do just one cylinder/head/pipe/carb mod and test. Bud Aksland built one from an RD bike, and we used that one to test the Lectron mods. Both were great parts runner bikes.

Another thing we developed on the Lectrons was a tear drop shaped throttle bore, non-symmetrical. Worked well.

With our one billit pilot jet Lectron, we got the loss in the lower end, off closed throttle acceleration dialed, and KR's TZ's carburetted well with the revised Lectrons. When Sparky left Lectron and started E-I, those new Blue Magnum's had both a power jet and pilot jet, along with a flat face tapered needle between them.

These new billion dollar carbs seem to have all those gimmicks and whistles.

One further development that was done, was by Keihin, for one of the XR500 four striker singles. It was a new design carb for use with that engine, but, it had issues with mixture reversion in the inlet tract. Too much back flow reached the jetting orifii oin the throttle bores, and caused erratic fuel delivery and distribution. Honda ended up using a conventional design Keihin on that engine, but, the reversion was handled in a rather unique method for a four striker engine. They added a cavity to the inlet port, and bolted a two stroke reed valve in place, between inlet valves, and carb.

Just motorcycle engine design history/development for all to consider.

What about a taper bored carb? Is that worth considering on a triple? Aeen Performance offers this service.

One just has to get the jetting correct, Mikuni round slides work just fine.

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