NZ F4 & 5 GP 2014 questions

**RDjase** · 21st January 2014, 20:05

Originally Posted by koba

From this:
http://www.kiwibiker.co.nz/forums/sh...post1130353876

And comparing
JTF548 with JTF253

Here:

http://www.jtsprockets.com/catalogue

It looks like the RS one is going to be a lot bigger...

JTF253 is the type I plan to use but have cut to 415.

I have got them out of the van now, grants old loncin engine is in the shed, will go and see if a RS will fit it, no idea were the XL engine is at the mo

**koba** · 21st January 2014, 20:11

Originally Posted by RDjase

I have got them out of the van now, grants old loncin engine is in the shed, will go and see if a RS will fit it, no idea were the XL engine is at the mo

Just went to the van myself, confirmed that this is what I run:
http://www.jtsprockets.com/fileadmin...rge/jtf274.jpg

**RDjase** · 21st January 2014, 20:20

Originally Posted by koba

Just went to the van myself, confirmed that this is what I run:
http://www.jtsprockets.com/fileadmin...rge/jtf274.jpg

Smaller centre, bugger

Found the KR engine and the Loncin, RS fits both and the KR sprocket is a JTF548-13. Thought I had done this before and remembered after reading the thread you posted

**koba** · 21st January 2014, 20:30

Haha, oh well!

Just did some workings, I already knew but max speed I can get with current setup and off the shelf sprockets (Which I have) is 116kph in 6th at 12000rpm.

It's not pulling 12K at the moment so would realistically be about 105kph. Ain't doing Taupo long track any time soon...

**F5 Dave** · 22nd January 2014, 10:23

You can use a CT70 sprocket on the MB, brought one from ebay aus 16T 420 that came down to 415. I ran it with a 46 at BOB but it was undergeared so I'm looking at ordering a 43 or 42

**cotswold** · 24th January 2014, 16:05

ok before I get .y full license can we have numbers of people definitely entering the f5 gp. I would expect the two dave's but who else?

**Henk** · 24th January 2014, 16:08

We left the upgrade licence off the entry form. Kamil is onto this and the updated form should be on the MNZ website at some stage. This means just a $50 upgrade so if you have a club licence don't get the full one just yet.

**F5 Dave** · 24th January 2014, 16:09

I have a club licence which I will $50 one time upgrade to full for the event. hoping AndrewA from down here will be keen. Also my mate Darrin will get his back to form after getting keen riding the foulstroke twice in the last couple of weeks

**Gigglebutton** · 24th January 2014, 16:29

Originally Posted by cotswold

ok before I get .y full license can we have numbers of people definitely entering the f5 gp. I would expect the two dave's but who else?

I have been working on my 50. Hope to have it done in time

**jasonu** · 24th January 2014, 17:23

Originally Posted by F5 Dave

I have a club licence which I will $50 one time upgrade to full for the event. hoping AndrewA from down here will be keen. Also my mate Darrin will get his back to form after getting keen riding the foulstroke twice in the last couple of weeks

Gossamer??????