#6

[F5 Dave]

of course, but even that ignores how the power comes on when cracking the throttle on from closed whilst still leant over. How's that pumper carb coming on then?

[richban]

How's that pumper carb coming on then?

Looks great thanks

Need to buy a couple of main air jets and head to the dyno. No dosh so it will stay on the bench looking pretty. She is crisp and a fresh apple at the moment so won't be in a big rush till new engine is ready.

[husaberg]

I never said I was a non believer in PVs, nothing like it.

I am not trying to be antagonistic but.... you kinda did Dave..

The nsr top end has a power valve which would be just the ticket for smoothing out the abrupt power delivery wouldn't you think.

Oh yeah with regards to Kart tracks how many meeting that count are run on them now.
Frits's post's seems to point toward,s an extra 3 or so HP with no loss in power spread compared to a Full crankcase reed.

well, . . .no, I don't think the PV is relevent.

????????????

So exactly my point. GPs are held on long tracks. Kart tracks are a different beast.

GP are held on long tracks were the PV is actually not so much of a huge advantage (relatively speaking) compared tighter more twisty kart track where it certainly will be a greater advantage. If you are referring only to the abrupt power delivery we have both encountered refer to the top quote.

[F5 Dave]

. . . . If you are referring only to the abrupt power delivery

Of course I am, many times. A PV isn't going to change that.

[husaberg]

Of course I am, many times. A PV isn't going to change that.

OK then, take your PV equipped bike adjust the PV it so its fully open. Now jam it in place. Then go for a ride.
I wonder if the power delivery will now be any more abrupt.
The other solely Disk Valved related abruptness as i said seems to have been sorted with modern technology

[koba]

OK then, take your PV equipped bike adjust the PV it so its fully open. Now jam it in place. Then go for a ride.
I wonder if the power delivery will now be any more abrupt.
The other solely Disk Valved related abruptness as i said seems to have been sorted with modern technology

A full powervalve NSR barreled engine will be thrashed by my 11hp MB if the PV motor is sitting on a workbench unfinished...

[husaberg]

A full powervalve NSR barreled engine will be thrashed by my 11hp MB if the PV motor is sitting on a workbench unfinished...

Nice and so very true

I think i can only pedal a couple of HP myself
But who said it wasn't finished yet?

[Yow Ling]

Nice and so very true

I think i can only pedal a couple of HP myself
But who said it wasn't finished yet?

I think you would be pretty fit if you could pedal 1/2 HP for even 5 minutes

To finish one must start hehe

[F5 Dave]

OK then, take your PV equipped bike adjust the PV it so its fully open. Now jam it in place. Then go for a ride.
I wonder if the power delivery will now be any more abrupt.
The other solely Disk Valved related abruptness as i said seems to have been sorted with modern technology

Power delivery or power transition? But you're not listening, you should spend some time racing on Kart tracks. Mike, I'm sure has thought about this quite carefully hence the purpose engine.

[husaberg]

Power delivery or power transition? But you're not listening, you should spend some time racing on Kart tracks. Mike, I'm sure has thought about this quite carefully hence the purpose engine.

Dave i can practically see a kart track from my house. This Kart Track (Coal Creek) makes any kart track you have access to in Wellywood seem like Imola or Nürburg.
I do plenty of laps there also.
I may not understand what you are trying to say,But a least i try, You seem to not bother to read posts, you seem to react to posts without first taking the time to actually read them.
I asked simply asked Mike a Question you jumped in and said that is a crap idea Why would he do that etc blah blah.

Have you looking seriously into a MB100 Disk conversion Mike, perhaps with a sleeved NSR top end?

From a previous PM with Mike

I have had a quick look a while ago but didn't follow the link to that engine. His clutch bits look exactly like what I do to fit extra plates. Now I've had a look at the MB after seeing what he's done it would be easy to convert an MB to disc valve. Not sure if it would be ideal with the diameter available for the rotary disc but I can already see a way around that.

Mike

lastly Trying to differentiate between delivery and transition. Why bother what is the point they are interrelated.

Anyway none of this has added to the Mikes thread any any constructive way.
Maybe i should count to 10 before replying to your posts

[F5 Dave]

Maybe i should count to 10 before replying to your posts

Maybe you should try a larger number

lastly Trying to differentiate between delivery and transition. Why bother what is the point they are interrelated

I don't think they are. That is the point.

Within a second the difference in transition is mute & we're talking delivery. I want that second. I want that transition calm, not jerky. Maybe you're just a better rider than me, but I can't turn fast laps on a Kart track without the right power transition.


I don't think a Disc valve engine is a bad idea, that guy did a stella job on the 50. A bunch of work & indeed an option for a GP track. But clearly Mike was building a kart track variant. I play Freddie Spencer to your Kenny Roberts.

Since when did KB become about being constructive?

[husaberg]

Maybe you should try a larger number


I don't think they are. That is the point.

Within a second the difference in transition is mute & we're talking delivery. I want that second. I want that transition calm, not jerky. Maybe you're just a better rider than me, but I can't turn fast laps on a Kart track without the right power transition.


I don't think a Disc valve engine is a bad idea, that guy did a stella job on the 50. A bunch of work & indeed an option for a GP track. But clearly Mike was building a kart track variant. I play Freddie Spencer to your Kenny Roberts.

Very clever but there's no way i will be left saddled with the Yamaha's. Even Kenny got sick of them. Freddy well just got sick ( Tendonitis i think)
I will be Doohan then. You can do Baiggi (ok you can do Cassoli as well if you want )

[F5 Dave]

I don't want to 'do' any bloke thanks all the same.

[husaberg]

I don't want to 'do' any bloke thanks all the same.

Whoo settle down Dave your aversion to both homosexual's and Italian's are well documented, so don't worry about it.

Anyways, I'm not using any queer daigo .

Although William Shakespeare did have a saying about protesting ... I think he.....

Anyway time to get back to bikes i guess.

[speedpro]

There's been a bit of work going on but alas more parts have been sacrificed. Gary got a nice new TKRJ piston and the kart shop bored and honed the cylinder. They charged extra as the cylinder was well out of round and a few extra problems that took time to fix. End result was a primo job as usual. Gary's crank is back together with a new ProX rod and a new flat silver plated big end bearing and new mains as well.
Put it all together and went to the kart rack last meeting to do some laps and run it in. Gary was circulating nicely taking it easy and the bike was sounding sweet. Upped the pace a bit and a couple of laps later it nipped up exiting the hairpin. A check of the plug didn't show anything suspicious and the motor turned over smoothly. We decided to give it another go but it nipped up again in the same place. I've dismantled it and found the piston has scuffs up the intake side and the piston is now a gentle push fit in the bore. My initial thought was that the piston was faulty but after talking to Wobbly I'm now thinking that although the ignition was more or less right for top end, as determined on the dyno, there was probably too much advance in the mid range which caused detonation which has damaged the piston. If we'd just gone out and run it hard we likely wouldn't have had a problem as the motor wouldn't have spent enough time in the dangerous rev zone to cause a problem. There is marks about the pin bosses that look a bit like cracks, and probably are. It'll be back together with a new piston for next meeting and hopefuly Wobbly will find where the pipe has gone that he's designed for it.
Dave's bike seemed to be going good but is a bit down on power. I'm hoping to check his motor soon and set the compression where it should be. With a good pipe for his bike and compression and exhaust port spigot it should be good for at least a couple more hp.
Got some more exhaust port mods to do on both bikes plus my new cylinder and my mate reckons he has a small enough TIG torch to go up the ports.