The Mut

**F5 Dave** · 29th February 2012, 08:17

well at least you know he isn't out chasin wimin.

**Str8 Jacket** · 29th February 2012, 09:26

Originally Posted by F5 Dave

well at least you know he isn't out chasin wimin.

Oh I don't know, that Mut is a bit of a bitch......

**husaberg** · 4th March 2012, 12:40

Woof woof woof.

**koba** · 4th March 2012, 19:59

I found out part of my head sealing issues were from not having the washers under the head bolts.
One engine I got didn't have them. The head tightened down just enough without them when the head gasket was in but when I took it out it meant the threads bound up before there was sufficient crush.

Goes much better with the washers in.
Te Puke will be interesting, if I've got the exhaust port too far wrong it will eat the ring and kill itself. Better take the other barrel and another piston...

**F5 Dave** · 5th March 2012, 08:45

As long as you've chamfered it it'll be fine, still very conservative.

yeah when you machine the head you need to shorten the head bolts or they bottom out.

Oh yeah & when I was replying to that text asking if you had power I was talking about electricity you muppet! we got put back on at 10pm

**koba** · 5th March 2012, 20:58

Originally Posted by F5 Dave

As long as you've chamfered it it'll be fine, still very conservative.

yeah when you machine the head you need to shorten the head bolts or they bottom out.

Oh yeah & when I was replying to that text asking if you had power I was talking about electricity you muppet! we got put back on at 10pm

Oh right, I'm easily confused.

I've raised the barrel a bit and the exhaust port a bit more.
I'll likely go further later but I'm still being conservative (wussy) at this point.

Next on the list is a proper lightweight pipe, the current one is messy, damaged and REALLY heavy!

After a run down the road it didn't seem HEAPS faster. I pulled it apart again and changed the piston for a brand spanker. I put one new ring on.

I also got out a piece of glass and a few sheets of sand paper and lapped my not-so-good head for ages and ages until I took off enough material to get the squish clearance tighter. Again, it's still no perfect but is a step in the right direction.

I plodded up and down the street for a while on the new piston before I gave in and gave it one squirt. Still not a world beater but definitely much, much better.

EDIT: With the ring I'm mostly worried about the port window not being even enough left to right, It's bloody hard to get right! I think it is even now but I still worry about it causing the ring to but the peg out.

**Clivoris** · 5th March 2012, 21:17

That sounds much better mate. If you want someone to sit around drinking and looking old while you work, give me a call. I've got some friends who aren't doing much.

**koba** · 5th March 2012, 21:23

Haha, I could even supply the beer; I have a few crates of homebrew-faliures sitting next to the bike...

**F5 Dave** · 6th March 2012, 08:15

you'll have to gfet it pretty unsymmetrical to cause an issue.

**koba** · 6th March 2012, 19:57

Originally Posted by F5 Dave

you'll have to gfet it pretty unsymmetrical to cause an issue.

Good to hear.

**koba** · 6th March 2012, 20:07

I've started on adapting the KX125 Ignition I brought.

It's handy that the taper is the same. (I must double check that though, I have only had a quick look.)

There is only one way the pulse-coil/signal generator thingy will fit in the cases so I will put it there and move the position of the rotor on the crankshaft.
It looks like it will sit in the right place, or close to it, if I un-rivet the centre of the rotor, move it around 2 holes and rivet it on again.

I should probably take some photos to jazz this thread up a bit.

**Dutchee** · 6th March 2012, 22:49

Originally Posted by koba

I should probably take some photos to jazz this thread up a bit.

We could do that Saturday night, while we're behaving. Could be a good game in there somewhere. If we don't put it together quite right, be easier to load the bikes up on Sunday and we can put it together at Easter.

**koba** · 7th March 2012, 17:31

Haha, true.

I've got a camera now. Actually two since that last time I didn't have a camera.
Both are broken!

First one got run over and the second somehow got a big crack in the screen.

I must upload the footage the first one was recording when it got ran over at Kaitoke. That's what happens if you leave your camera next to the track!

**Clivoris** · 7th March 2012, 18:31

Originally Posted by koba

Haha, true.

First one got run over and the second somehow got a big crack in the screen.

That's what happens if you leave your camera next to the track!

Is that what happened to Hels?