Day Out.

[whitehillbilly]

First trial for the Greeves and Myself ( 20 Years )
After 11 sections, a flat tyre, ended the day.
The Greeves ran well, much better than I had thought. And the Rider was looking forward to the second lap.
Bike rack on the back of my Mitsubishi work well as well.
Look forward to a few more in the coming year, but will have to work on the legs a bit.
Will have to try and get hold of a 60T, 428 blank sprocket. Any ideas who might have one, steel or alloy.
Any way,
Thanks to SQTA, for the day.

[Terryg]

Yea was a good day but a bit hot. I fell off twice but will come good in a few days, I pulled on the front brake and some how opened the throttle and flipped it so we live and learn. I tried Golf and kept loosing my balls and almost lost 2 more riding in trials.

[whitehillbilly]

Throttle and brake wont cause the same effect on the Greeves !!!!
And my BIG tank is like a cushion.
See you next trial.
70's Rosco boots, delaminated one sole. Liquid Nails, Tek screws, should sort it out.

whitehillbilly

[oldslowcoach]

Good work Hill Billy. Most likely this lot has the blanks,
Renold Australia, Unit 10, 31 Boyland Avenue, Coopers Plains QLD 4108 (07) 3719 2400. I got something similar a couple of years ago for the cub

osc

[whitehillbilly]

Thanks OSC,
Villiers Services, have them ready to go, 1 7/8 inch centre with the 5 stud holes, $64 plus postage, will ring to see the cost of postage.
I will ring Renold Au and get a price, plus then the cost of machining the holes.
Turned out the Flat was a result of ripping the valve, out of the rear tube. I am running 2 bead locks, but will have to check they are the correct size.
Anyone know what the difference is ????

whitehillbillies

[whitehillbilly]

Hi,
Just measured the rim locks.
I have two WM2's as the size across the edges are 1.85"
Where I should be running WM3's at 2.15" Inner edge of rim 2.25"
Would this be correct ????
Alloy or rubber locks preferred ????
Any advantage in running SUPER thick tubes ????

whitehillbillies

[David Lahey]

Don't be too sure that the reason for the ripped-out tube stems is the tyre slipping on the rim. It can alternatively be the tube moving inside the tyre causing the problem. I was almost driven nuts with the rear tyre on my KT250 about 10 years ago. I was getting pretty sick of manually moving the tyre to get the tube stem back straight again after each ride so I went through the process of beefing up my tyre locking on that rim. The tube stem kept getting pulled inside the rim even after fitting two new fancy solid aluminium tyre locks and installing self-tapping screws that went about 10mm into the bead at each tyre lock. because even all this made no difference, I thought again and made some paint marks on the tyre and rim and found that the tyre was not moving at all relative to the rim. It was the tube being pulled around inside the tyre that was causing it. It was an IRC tubeless tyre of early 2000 vintage on the standard DID KT250 rear rim. I can't remember what tubes were tried
As far suggestions for which tube to use:
IRC tubes work well and are cheap
Michelin trials tubes work well but tend to form blisters and pop if you use more than about 40 psi in combination with the solid aluminium tyre locks, and they are very expensive. I think they pop because there is a void created at the ends of those locks and the tube can blister out into the void
Moulded rubber tyre locks where the rubber is moulded over a thick aluminium core are very good, but I have only seen them as OEM items on Suzukis
The moulded rubber tyre locks that are moulded over a pressed steel core (as come as OEM on Yamaha TYs) are rubbish because the steel core deforms before they grip the beads strongly and are sized for 1970s tyre bead thickness
If in doubt about tube sizing for a trials tyre, get a tube that is labelled with the 4.00 well within the size range (ie 350/400/450). Our 4.00 rear trials tyres are much bigger in cross sectional area than a 4 inch (100/100) MX or road tyre.
No advantage in using thick tubes
Do definitely enlarge the tube stem hole so the valve stem can lean way over, and don't fit an external nut against the rim
The trick with the sizing of the tyre locks is that they don't quite bottom against the rim. Measure the thickness of your tyre bead and compare that to the gaps you get when you fit the tyre lock without a tyre in place. Most of my rear rims suit 1.85 rim locks but the TY250A suits a 2.15 clamp

[JC1]

Shane, nice to hear you're out & about on the Greeves. Must be the only one in competition in Oz.

[whitehillbilly]

Thanks John, and David,
for the comments.
Rang Villiers Services. I can get a 60T 428, sprocket, drilled ready to fit , including postage for $80. Don't sound to bad.
Picked up a couple of 2.15, alloy and rubber rim locks. These seem a much better fit.
Will also add a spare front and rear tube to the tool box.

whitehillbillies

[whitehillbilly]

60T ordered from Villiers Services.
See you at the Next SQTA Trial, over near Kyogle.


whitehillbilly