430 dyno time

With my 82/3 430/500 framed motard on the road I've got dyno time tomorrow which may interest some. I just weighed the bike with a full tank at 110KG. The engine is port matched and knife edged, apart from that stock.
It has a big flat spot before the power band which is peaky and brief. I'm running really tall gearing so it won't stay in the power between the gears. I suspect it's the pipe which was originally pro-form (US) but I'm hoping a while on the dyno will get things better rather than just change the pipe.
Either way, tomorrow I should have interesting results to post or some pics of a well and truly blown motor.

cannot wait have the same engine being rebuilt at the moment, what are you expecting after the dyno tuning horse power/torque wise.

Absolutely no idea ! When it hits the power it really takes off. I have a 60hp KTM 4stroke to compare but it's so different I can't. I would maybe think 38-40(ish)? and torque, who knows.. With some vibration as well when it takes off, it's a real rush, especially with a drum brake on the road

110 kg = 242 lbs. Minus 14 lbs for 2 gallons of gas weight = approx 228 dry.
Awaiting your results. I have two water cooled 430s and always been curious about HP and Torque. Even ballpark numbers would be interesting.
Thanks,
Dave

Will be waiting patiently for I too are curious.

I read a magazine review of an '81 430CR and it said it made almost as much as a 490 Maico, so depending on the dyno I'd say upper 40s since the 440 Maico made 48.

I have read 42 with the XC/WR steel silencer,46 with the CR silencer

I had a similar issue with a YZ250 I supermoto'd, geared as high as possible for a good top speed with a standard front pipe, BTW 1st gear was ridiculous and had to slip clutch to about 30mph, I then changed the front pipe for a DEP and it moved the power band just out of reach between each gear, 2 teeth up on the rear sorted it though with no loss of top speed.

I was 0.77Hp out! 37.23 max. I will post all the details ASAP.

First the exact spec of the engine
82 430 6 speed
WR barrel with two ring wiseco
430 Pipe originally from proform but cut and shut to fit and completely re-welded
Electrex internal rotor ignition at 2.1 BTDC
B8ES plug
Std 38mm Mikuni started with 2.0 slide, 45 pilot, 430 main and 6DH3 needle.

First is a before and after.

Before-It was dropping power and then peaking at 29HP way too rich

Lots between and some tweaking then-

After - gone down to a 360 main and needle on top clip. 35Hp on this run. Leaning off the main has given an extra 8hp and smoothed off the curve at the top. Mid section flat not dropping but ran out of clips on the needle. Could drop the main again to bring it up but risky so it stays 360 and I'll sort a new needle some time. It should be way more rideable now.

RPM shows up with torque on pic 2, signal lost at the top end but you can see peak torque of 26.3 ft-lbs at about 6300rpm.

Last graph is the final good run through the gears with a good 37.23 HP and a top (Dyno) speed of 85mph.
The dyno guy has advised me to move the kill switch to the left and on long run downs hit it and throttle at the same time to avoid siezing/damage to the piston.
Can't wait to ride it!

345Hp per ton (metric) Good ratio

The entire workshop looks like its vibrating! 37 horse at the back wheel is a whole lot of go

Dyno guy was surprised at lack of vibration. It ran sweet

Is 85mph enough of a top speed for you?

Current gearing in perfect conditions it would be yes.

On drum brakes you're possibly wise not going any faster!

Exactly. But, now I know it's possible I'll have to do it. Just once !

HUSQVARNA 430 WR
"tour de france moto "
(race )
France Europe 1982

Funny pic, notice all the leathers, boots, full face helmet.....No gloves!!

I see he has a front disc conversion though! pussy.

race nigth in the road (1982)
brake BREMBO DUCATI !
pilot pierre FAUCHER !