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Messages - John Orchard

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Suzuki / Re: Suzuki still selling new TS185's!!!!!
« on: July 12, 2020, 08:29:13 PM »
yeah id like to see a ts185 class,so no porting and tm125 gearbox John?

Dealers could wire the engines closed from new, just pipe, airbox & jetting changes allowed. Have an Aust Champs, sponsored by Suzuki :-)

Suzuki / Re: Suzuki still selling new TS185's!!!!!
« on: July 11, 2020, 10:02:28 PM »
Each country should have a TS185 race class, you can only remove bits & rejet. Bring racing back to low cost.

Careful John, you'll start another "Do you Moto100" thread.

I must have missed that one :-)

Suzuki / Re: Suzuki still selling new TS185's!!!!!
« on: July 11, 2020, 10:43:28 AM »
Each country should have a TS185 race class, you can only remove bits & rejet. Bring racing back to low cost.

General Discussion / Re: ozlotto
« on: June 16, 2020, 09:54:28 PM »
I have a Tatts account, can set-up favourite numbers, quick & easy.

General Discussion / Re: Parcel deliveries
« on: April 07, 2020, 01:21:30 PM »
I currently have two overdue, one from Australia, one from NZ.

General Discussion / Re: AMA Vs MA controlling bodies
« on: February 20, 2020, 09:12:40 PM »
MV own Broadford, if MA ceased to operate MV could still continue with income from the circuit. Maybe MAIL (Motorcycling Australia Insurance Limited) could continue to offer motorcycle participation insurance somehow? I guess there will always be a place for competition in business, so MA will still be around.

Wanted / Re: Yamaha RT1 Clutch actuator
« on: February 19, 2020, 08:28:30 PM »
It was sleepy.

Kawasaki / Re: Preston Petty plastics in Kawasaki Green
« on: February 03, 2020, 04:39:45 PM »
Yeh I nag Preston everytime he posts something new on Facebook  :-)  I'm wanting a lime green Tony D.

Introductions / Re: Hi All, I've just joined
« on: January 27, 2020, 10:36:29 AM »

Did you ever get the squish clearance mod done to yours?


I did mod the head, l narrowed the squishband to 15mm wide, closed up the piston to squish to 1.2mm.

The best mod with the standard carb is to extend the pilot jet pick-up to the bottom of the bowl, it reduced pinging by about 75%. This helps with all big-bore 2-strokes that run a carb with a pilot-jet that sits high in the float chamber; with such high vibration, the pilot is just sucking airated fuel. Reducing the last 25% I got by filing the bottom of the slide, making part throttle richer with less slide cutaway (careful the slide does not bottom-out on the needle-jet shroud).

YZ490 riders back in the day always complained that going rich to stop the ping caused it to blubber down the bottom ............ pilot sucking airated fuel.

Introductions / Re: Hi All, I've just joined
« on: January 25, 2020, 09:51:13 PM »
Welcome Andrew, yes lots of good info here.  I just sold my '84 CR500; still have a good gearbox & rear shock if you need. :-)

Tech Talk / Cheap shock curious.
« on: January 16, 2020, 01:37:06 PM »
I've always been curious to see inside Cheap Chinese shocks, they look pretty cool on the outside (the ones fitted to the newer Chinese bikes), I wonder if they can be made to work with a bit of 'home maintenance'?

I have a pretty recent Chinese made Atomik 250 here, upside down forks, rear shock with adjustable Comp & rebound; I'll take the suspension apart when I don't have any vintage stuff to work on (hope I live that long ha ha).

I recently bought a pair of $100 new Chinese rear shocks off ebay, listed as Honda CR125M fitment (I needed 365mm length) , yes before you bag me out, I was not expecting much, but as the Little River Band says "Curiosity killed the cat".

These shocks didn't look too bad quality/build wise, probably much like what might have come stock on my DT1, BUT the spring rate is too strong for a 4" travel bike, I'm guessing the rate might suit the CR125M2 with the shocks mounted further forward?

Damping wise; almost no compression damping, the rebound is about 4 times what is needed; not knowing if the internals utilize any shim washer style valving, as these are not rebuildable. These are not gas filled, so I drilled a hole in the bottom of them, drained out what looks like about 10wt cooking oil. I then braised a steel schrader valve in.

While flushing the shocks with diesel fuel, before the final oil fill, I noticed the damping weren't much better, diesel fuel has an ISO (International Standards Organization) viscosity of about 2 Cst (about 1wt), I had some ISO 8 Cst (about 2.5wt) shock oil on the shelf, so I mixed it 50/50 with some diesel to thin it out.

So, the 50/50 mix is in the shock, the air pressure that I felt best (only going by a push test in the vice) was 75 psi on the guage, which is about 60psi once the air pump is removed (I refitted the air gauge and added half of what the loss showed).

And so, yep still no compression damping (as expected), maybe the stiff springs might help keep it off the bump-stop? Still about twice as much rebound damping that is needed, maybe the stiff springs might help fire the shock back?

Anyways, These will lay in the spares box, as my second choice 'last resort' should I need them one day ;-)

Sure I will do it again, while I have a dollar in my pocket, the curiosity will always eat me up.

Wanted / Re: 78 suzuki TS185 frame
« on: January 09, 2020, 10:33:27 PM »
Sorry l just dug-up the frame, it must be a '76, it is a single dowtube.

Wanted / Re: 78 suzuki TS185 frame
« on: January 03, 2020, 11:14:01 AM »
I'll check the details on the '77 engine & frame l have here, l'll swap it for something of interest ;-)

Competition / Re: 2020 Classic Nats
« on: December 25, 2019, 10:17:26 AM »

Would be good if the pre 75 rules were the same so pre 75 bikes could be run as they were factory made without having to fit spacers

What Pre 75 models came with too much travel?

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