Messages

31

Yamaha / Re: YZ125G Build

« on: February 08, 2020, 05:29:24 pm »

Are the 2 brake arms the same length? I assume you mean the torque arm that attaches the brakeplate to the frame
On my 465 I fitted a later model alloy arm which had to be shortened, I cut the bearing end off & made a new 1 that took a standard GE12 bearing that was 0.5mm smaller on the outside than the special platinum plated gold bearing Yamaha fitted, means if the new owner ever needs to replace the bearing he can buy it at any bearing retailer
Looking forward to seeing how the bikes progress

32

CZ / Re: still have timing problems

« on: January 09, 2020, 07:16:05 pm »

I think Noel might be on to something, is it possible that the timing is 90deg out? When I built the Suzuki ignition on my 380 I had similar problems & it turned out to be out by a lot, the late Tony Lagor came around with a strobe light & we found where the igniton fired then added marks which we used to get the timing in the right place
With the 2 sets of mounting slots I'd try using the other set & corresponding mark to see what happens

33

Tech Talk / Re: Steering stem nut torquing?

« on: December 19, 2019, 07:16:15 pm »

94ftlbs seems excessive, that's more than the nuts on crankshafts & clutch hubs

34

CZ / Re: falta 250 timing

« on: December 13, 2019, 04:45:15 pm »

Haven't seen the internal rotor ignition on Vape's site but the instructions for the external rotor says to line the short mark on the stator up with the line on the rotor at the normal firing point or to start at 2mm BTDC & work from there
Going off Bamford69's experience I'd set the timing at 2.5mm
Gerard Copping at CZStuff told me he finds that with modern petrol that the bikes get better overall performance with the timing set slightly closer to TDC. His numbers for 360/380s are 3.3 - 3.5mm depending on single or twin plug ignition

35

General Discussion / Re: Australia-New Zealand

« on: October 16, 2019, 10:30:54 am »

Don't you mean feesh?

36

General Discussion / Re: Check the label

« on: October 10, 2019, 08:40:04 am »

And sniffing butts instead of shaking hands when you meet someone

37

CZ / Re: Sidepipe rear subframe

« on: August 30, 2019, 05:34:45 pm »

lee is a good bloke been mates for years also been to his house a few times all around good bloke will help you if he can
he has a good system for pionts set up if you keep them mine was great that way
jim

I got to meet & have a good talk with Lee at the DMCZWC this year.
Really nice guy, showed me some of the strange things on his yellow tanker's frame like the sidepipe downtube but black frame engine cradle thought to be that CZ were using up the leftover sidepipe parts as they started producing the yellow tankers

38

CZ / Re: CZ Aftermarket Head. Period Item?

« on: August 06, 2019, 09:38:45 am »

Looks good fitted to my sidepipe motor, weighs about 1/2kg more than the standard head. Will be interesting to see how it looks when the frame is back from repair & painted, will be running twin plug ignition which comes in from the sides

39

Bike Talk / Re: Aus/NZ aftermarket frame builders

« on: July 22, 2019, 09:00:16 pm »

Was over at Steve Roberts place today giving him my 74 swingarm so he can confirm that the subframe isn't twisted after he replaces the rear downtubes & straightens the seat tubes.
He told me there are 4 plastic fantastics, he has the prototype & #4 which was built as a road going racebike with lights etc. The aluminium monoque which was built before these was a 1 off though
The TR500 next to it is quite interesting, the frame & bodywork were never built into a bike back in the day & the owner of them offered them back to Steve a few years ago which he really appreciated. He said he could have made a new frame but to him that would be a replica even though he was the only builder. The motor in it is missing pistons but he has another being built up to fit shortly, now he just needs to find a Spartan & he'll be happy

 

40

CZ / Re: 360 sidepipe pistons

« on: July 22, 2019, 07:09:31 pm »

Morley, I normally use Phil at the engine rebuilders on west street. It doesn't seem to matter if the piston is cast of forged in the big CZ motors, they all run 0.09mm clearance on the 80-84mm bores
Glad to be of help Zane, actually thought the original drawings I'd done were lost so I've now taken photos just in case

Guess where I've been today

The original plastic fantastic F1 Suzuki, I found out today that there were 4 built with 1 being a road bike. There was only 1 of the aluminium monoque bikes built before that though

41

CZ / Re: 360 sidepipe pistons

« on: July 21, 2019, 08:43:28 am »

I bought the ignition side holder this time from DIYvintagemoto but have the drawing from the motor in the background somewhere but I'll need to take a photo & upload it
This is the drawing for the clutch side holder, you'll need to measure what the distance is down to the bearing & make to suit. The original holders measure about 0.5mm more than will fit so they must sit proud & cause the steel plate to bend a bit.
O-ring size could easily be 3mm section, may make it easier to source in viton. Position isn't critical but groove dimensions are as the o-ring does the centering in the bore as well as sealing, I've done it like this so it comes out easier when needed but the OD would probably work at 51.90mm just as well


Just found the drawing for the ignition side, the DIYvintagemoto version doesn't have a o-ring & isn't radiused either which is just a looks thing. I'm just using the gasket out of the cometic gasket set on the sidepipe with sealant on the motor side of it

At the bottom of this drawing is the later type drain plug with the fine threads, I had a few made at the same time because they are something I haven't seen for sale & at least 1 of mine was heavily damaged from the wrong size socket of possibly adjustable spanner used previously

42

CZ / Re: 360 sidepipe pistons

« on: July 20, 2019, 12:02:43 pm »

Cylinder is back from honing to finished size & vapourblasting. Sanding & polishing the sidecovers at the moment, should be able to finish assembling the motor during the week & try to find what went wrong with the hybrid Suzuki ignition

Have 1 piece aluminium seal holders on both sides of the crank & will be picking up the clutch hub that I've had modified to help with the leakage problem that CZs are known for, will be interesting to see if it works

43

CZ / Re: falta parts

« on: June 29, 2019, 11:45:11 am »

This looks to be the same system, a couple of the photos show the crankshaft type that you should have
https://www.ebay.com/itm/cz-250-cz-980-cz-513-cz-falta-cz-997-cz-125-cz-984-cz-mx-ignition-set/254273191849?hash=item3b33dcffa9:g:PwUAAOSwCkldD2XA

44

CZ / Re: falta parts

« on: June 28, 2019, 03:57:30 pm »

wow thanks tony mine has a 10mm head size bolt i was very close to ordering it, know where i can get the right one? thanks steve

Contact Charlie Richardson at CR High Performance, he lists both types of ignitions for the same price of $500us. The units he lists for 125s/Faltas are PVL units. I prefer the flywheels he uses to Vape which look like the magnets are glued in place, the system I have in my 73 is from Electrexworld & it also has a smooth flywheel which is 200g heavier than standard
http://crhighperformance.com/?wpshop_product=cz-electronic-ignition-469-95
The Vape system for the model 513 that Etovar lists also says post 74 980. Wiring looks to be set up for the shark fin casing. Price is the same as the other sort
https://etovar.eu/en/cz-motocross/2670-electronic-ignition-vape-cz-513-980-motocross.html?search_query=vape&results=57&
The Wossner circlips part number is CA18, these are exactly the same as CZ used, I normally buy a few sets at a time of Bikebuzzard on eBay but the local importer may be able to get them for you as well

45

CZ / Re: 360 sidepipe pistons

« on: June 27, 2019, 08:06:16 pm »

Gerard Copping from CZStuff mentioned he had a 80.91mm piston kit which he sold me for a really good price. From what I understand it is a early Kolbenschmidt due to it having 2 cast iron dykes rings
The cylinder had been bored to use a used piston & needed to be honed out .05mm for the new piston, it has cleaned up nicely