SOHC

I have a circle cutter knife thing

If it lasted that long it must be good? Thees old regulators have relief valves in them and way better valve seats, can be stripped down to clean the build up of shit easy. I got a brand new set of BOC regulators 3 years ago and they have failed, before that I had another set that started leaking after a year. Some of the cheep ones have cardboard faces is the gauges and the flow is terrible as I do a lot of brazing almost every day, when end I go to the shed I will get a pic of my regulator graveyard

Finally found the proper 2ply 3.2mm synthetic shit, took a couple practice runs to get the cutter right but now they work.

I think you should get a GN400 next

Take it back lol

Didn’t you just buy this bike? Is it still under warranty?

Didn’t you just buy this bike? Is it still under warranty?

wile its running squeeze Jiff into the carb for extra piston to bore clearance

I just remember those cbr250 and fzr250 gsxr250 would sometime be totaly fucked after under 20,000 kms. When I was doing my apprenticeship my job was to put the 1st 5 kms on the new bikes and I was threatened with death if I blew them up

Some pistons need measuring at the bottom of the skirt and some just below the bottom ring for piston to bore clearance. If it was was me I wouldn’t rev that little bike so hard at all

I cannot see anywhere where it says hold the engine on the maximum RPM it can possabley do

No but piston and rings still need to bed in over 150 kms or so, just keep doing what your doing it seems to be working well for you

The final mechineng proses happens in the 1st few hundred kms of a new engine, you must keep rpm and load down, I have seen a few times people go nuts on a new engine and damage them, read the book that comes with a new bike,

I wouldn’t recommend it, needle roller big end bearings don’t like high rpm, piston rings can only travel so many FPS or it cuts the life in half.

they need over 100 kms to run in before you pull rpm like that unless you have given it extra piston to bore clearance and even then holding a stock GN125 on RPM like that is bound to fuck it

Me and my dad went to get that plate cut in 1987.

Do you just slap a new piston in each time then hold it at red line? I think the problem is the guy on the other end of the throttle cable.

I found Pipeline in avondale has some

Made this BBQ for this summer, those are proper fire bricks.

They are cool, I am glad you saved them, I saw a prop blade once that the old guy had been cutting out conrod blanks for his JAP speedway engine from,

Shuk didn't have what I want. who else in NZ would have nitrile diaphragm rubber sheet 3.2mm?

I might try them, if shuck dosnt have it, para only has single ply, I think it’s possible to get proper diaphragm sheet

Yip para have only have one kind

Where would I find some reinforced rubber sheet to make a diaphragm like this?