The 50

[richban]

Did you work out where you were at with the ign?

No. I can't change anything right now so just going to run it. I may have time to plug the ignitech on. Will see how I get on. Oh yeah. And thanks for the lend of the PWK 28. With an old FXR intake rubber it is going to work out great.

[richban]

Engine back together. No carb rule for 50's 40mm carb for a 40mm piston. Maybe not.

[F5 Dave]

Can you fit two?

[cotswold]

Went into town tonight to see the boys from ESE to get a few pointers on how to set up my head insert.
TZ spaced the plug with a copper washer to get it around 4.5mm from the piston, we then cc'd the insert and it came in at 3.4ml which is what Kel designed it to be so awesome work Kel and Seymour.
The shock and it's 1000lb spring have been parted and Culley loaned a spring off an NF4 to try, just have to make up a centering cup

[F5 Dave]

Looks great. With the copper washer it will increase the heat range a stat so the CR8 will become a 7 where it should be a 9 or 10. Will burn a hole in the piston pretty quick if it makes decent power.

[cotswold]

Looks great. With the copper washer it will increase the heat range a stat so the CR8 will become a 7 where it should be a 9 or 10. Will burn a hole in the piston pretty quick if it makes decent power.

Dave, that plug was only for my engineer mate to use as a template for the thread, I have a couple of 10's on their way. I bought CR10EIX NGK but I seem to remember Wob's saying they could shit the electrode, any better plugs you could think of that dont cost $60 each (Denso)

[F5 Dave]

You're in my the four stroke plug realm now.

[richban]

You're in my the four stroke plug realm now.

After mucking around with subframes and finding various problems with suspension like they front is buggered and the back is buggered. The 50 engine will now be slotted into the NSR they both weigh the same so no big deal really. But I did like the short wheel base of the rs50.

[seymour14]

After mucking around with subframes and finding various problems with suspension like they front is buggered and the back is buggered. The 50 engine will now be slotted into the NSR they both weigh the same so no big deal really. But I did like the short wheel base of the rs50.

Still think you'll make next week? Times a moving quickly now.

[richban]

Still think you'll make next week? Times a moving quickly now.

Dyno tomorrow. Hell yes I will make it. Looking forward to seeing how it goes. It has never been on a dyno before so tomorrow will be the base line. Lets hope the line is the right shape.

[kel]

TZ spaced the plug with a copper washer to get it around 4.5mm from the piston,

the depth of the plug insert was to allow the unthreaded part of the plug to sit in the combustion chamber like this

You gave the top secret design to the Griffiths

[seymour14]

the depth of the plug insert was to allow the unthreaded part of the plug to sit in the combustion chamber like this

You gave the top secret design to the Griffiths

And I didn't even give you one billion dollars...

[cotswold]

the depth of the plug insert was to allow the unthreaded part of the plug to sit in the combustion chamber like this

You gave the top secret design to the Griffiths

lol me and TZ looked at that and thought it looked a bit far down, when we measured the distance between the plug and piston it was outside TZ's comfort zone, so you are saying take the washer back out????

[cotswold]

And I didn't even give you one billion dollars...

you promised not to look while you made it..........

[richban]

Ok so we have a base line. We got it going with stock ignition and a blind guess with the main jet. 13.2hp @ 11500. and reved to 14k Big hole after peak power.


Hummm.


Ok we were going to fit the igntech anyway so did that. Few issues there, solved by Glen and google translate. Czech to english from the igntech site. Boom away we go.

Still same main jet and some ignition fiddling and 13.7hp still peak @ 11500. big hole blah blah blah. So we thought well lets try jet it. Changed to leaner main and then strange scrapping noise appears in engine. So that is where we left it. I am about to go up to the shed and do two things. 1 change pipe reducer from 13mm to 14mm. 2 find out what the bloody noise is. I am hoping its the clutch.

Anyway this thing revs to 14k happy. and makes 13.7 at 11/ 5. Still no proper cylinder head design and pipe is shithouse. A good start for a rush job.