Will I get my 100 ready in time for Taupo?

[F5 Dave]

low tens side of coil. Trace re-appeared when clutch didn't slip.

First day out. First race disappeared with run away. Sadly that didn't prove too much as Fish pulled out, Andrew got gay as it looked like rain & Rich & Hamish didn't show.

Bike was going well, quite fast when it got up there, but had a carburation lag. Tried another needle but it wouldn't run. Back to old needle with a couple down on the main as muggy day.

maybe I should post on ESE thread for some jetting ideas.


Arsebiscuits!

[koba]

low tens side of coil. Trace re-appeared when clutch didn't slip.

First day out. First race disappeared with run away. Sadly that didn't prove too much as Fish pulled out, Andrew got gay as it looked like rain & Rich & Hamish didn't show.

Bike was going well, quite fast when it got up there, but had a carburation lag. Tried another needle but it wouldn't run. Back to old needle with a couple down on the main as muggy day.

maybe I should post on ESE thread for some jetting ideas.


Arsebiscuits!

ten characters

[TZ350]

After all your work, thats bad luck, what brand of piston was it?

[husaberg]

After all your work, thats bad luck, what brand of piston was it?

Genuine sincere commiserations Dave.
but you know i have to ask What brand piston is in your non Honda, Honda powered Honda engined Bike.

[Bert]

Is that the second YZ100 piston Dave? or is that the same one recycled from before Christmas?

Its taken one hell of a beating... I hope its not a common theme with those pistons..

[Farmaken]

low tens side of coil. Trace re-appeared when clutch didn't slip.

First day out. First race disappeared with run away. Sadly that didn't prove too much as Fish pulled out, Andrew got gay as it looked like rain & Rich & Hamish didn't show.

Bike was going well, quite fast when it got up there, but had a carburation lag. Tried another needle but it wouldn't run. Back to old needle with a couple down on the main as muggy day.

maybe I should post on ESE thread for some jetting ideas.


Arsebiscuits!

Looks like one of those mysterious electrical problems !!!

[fi5hy]

get it over with Dave buy some valves an become a diesel

[F5 Dave]

um, Fishy I don't think you can talk. Yesterday you handed me the very same looking piston from your Longchin

[F5 Dave]

Well that is the last time I use a YZ100 piston I thought as I levered the top out of the barrel with a skinny screwdriver.

So what caused this? I figured that maybe those gungeon pin adaptors had somehow knackered the piston. indeed they were scrap after the carnage.

Bore has a tiny scrape. One thing that was concerning was the amount of rattle with this piston in it. The full length MB piston didn't sound this bad. but then again the YZ piston has a big scoop in the back of it.

The bore looked good when I got this barrel with not real marks or lip. It was 1st over so I ordered the corresponding YZ piston. Before I had run the piston from my original 100 barrel that was brand new bar 1/2doz dyno runs. That survived the BOB 55 min race. However I did note it had a crack in the front of the skirt when I took it out.

Maybe the bore was bored too big to start with. I never measured it, I don't have any 3 point mics, or heck even any 2 sided.

I might have to risk another YZ piston next size up. Man this is testing me.

[speedpro]

Tell us again why you are using YZ pistons. The stock Honda pistons only come apart if you are already revving the nuts off it and change down. The Hondas will lose a tip off a ring before the piston comes apart. I've been there.

[F5 Dave]

yes this is the 2nd piston, I'm questing to rid the world of YZ100 parts it seems.

Well re the MB piston, I wanted to see if a thinner ring would provide more power. While they might not break if they are fluttering they can't be sealing or transferring heat as well. I remember my MB50 ran considerably better when the RD piston with the thinner rings went in. Although you will well remember the consequences, but that was the crank's fault pushing the piston out the cases.

strangely my MB50 ring tips would pop off on a regular basis & it didn't go much past 12.


New YZ piston on order but will bore it to 51mm.

[speedpro]

I should figure out how to start a poll.

[F5 Dave]

Hey the back up bike has been offered. Just have to work out how to pay for all these things like pistons & parts for other bikes + come up with silly $ to enter two GP classes.

[F5 Dave]

Well I took a day off work to assemble the 100. rebore got done fri morning (late) but Sketchy made up some more adapters for me. They are somewhat tighter so I'm not looking forward to taking them out, but safety first & all that.


ran the bike in in Practice & first race. Still makes a weird noise, but doesn't have the chronic piston slap of before. Well it went ok but I had to relearn to ride Kaitoke & overcome a flat spot coming onto power. Fortunately once you've worked it out the only time it is an issue is in the warm up laps & thereafter you'd never know it was there.


After a few years of slowly slipping down the pecking order racing the 50 against the 150 4 strokes I was concerned as I was losing ground going down the hill section & surely you don't use full power there. But as it turns out having more power really does help. Everywhere.

There's still a few things I could experiment with, a back to back with the RS pipe. And the RS ign which seemed to give more overev & possibly more power. Retry carbon reeds as its got steels atm. But after this weekend I'm very tempted to just change the gearing & ride that fcuker like it is.


Bwahahahaha!!!

Oh yeah & for the original post. I think the 100 is ready for Taupo.

[Number One]

Sounds promising Dave!