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Messages - David Lahey

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Tech Talk / Re: Yamaha shift stopper lever trouble
« on: October 08, 2018, 08:11:27 PM »
A picture is worth a thousand words

Suzuki / Re: DR500Z Swingarm
« on: September 22, 2018, 09:50:44 AM »
When you do your build, It's a good idea to retain the cush drive hub to prolong the life of the gearbox

Tech Talk / Re: Curing handlebar vibration.
« on: September 19, 2018, 09:52:27 PM »
One of my bikes (with un-braced solid alloy bars) is so bad I lose vision frequently enough that it is a problem. I'm thinking of using lighter bars to get away from that frequency, or fitting a brace. The front wheel/forks resonate at idle too but that doesn't affect my eyeballs

General Discussion / Re: Sciatic nerve
« on: August 09, 2018, 08:35:41 PM »
Wow I just looked and Charles is still in business after all these years

General Discussion / Re: Sciatic nerve
« on: August 09, 2018, 08:32:53 PM »
Yes, when I was in my 30s. It was terrible all right. I used to go to a therapist called Charles Angles or Angels at Alexandra Hills in Brissy who used to push it back into its groove which was fairly painful at the time but did work for a while each time. I eventually stopped having sciatic nerve problems.

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 08, 2018, 08:26:59 PM »
As for weight saving compared with steel, aluminium (at room temperature) is approx 1/3 of the strength of steel and approximately 1/3 of the density of steel so there would be no weight saving

Tech Talk / Re: Alluminium disc rotors, your thoughts?
« on: July 08, 2018, 08:24:21 PM »
The strength vs temperature relationship for aluminium and its alloys is such that it would be useless for motorbike brake discs

Is Tony Ceglinski still about?? Never met a more passionate and enthusiastic motorcyclist!
Tony passed away a few years ago

Twinshock Trials / Re: Longterm TY250C
« on: June 18, 2018, 01:02:07 PM »
Yes that gear shifting description is fairly standard for those motors. You wouldn't want to be in a race.
The reason I asked about the flywheel band is that many years ago I took the band off one and liked it for a while then went to using a flywheel with a lightened band. I removed a bit at a time from the width of the band and ended up with about 2/3 of the band left. Since then I have lent the flywheel with no band to people who are trying to decide what to do with theirs. In each case they have ended up using a lightened band. That's why I'm interested in what you find and do with yours.
Yours being a C model would have come with a "heavy" band, same as B, D and E models. The A model came with a lighter band which is pretty much the same weight band as what mine ended up with.
As for your jetting, it may be worth trying a bigger main jet before trying to find an alternative needle or reshaping the needle, because the OEM Yamaha Mikuni is an odd design and alternative parts are not available from Mikuni parts suppliers. The slide and needle are shorter than a standard VM26 and were made that way to minimise the height and weight of the carby. The B model TY250 carby does have a different needle shape and main jet size to the CDE models and I suspect that they needed to change the jetting when they changed the design of the airbox.
Yes the Majesty damper rods are a good thing

Twinshock Trials / Re: Longterm TY250C
« on: June 18, 2018, 09:49:39 AM »
Lovely bike. I'm interested in what you think about the motor performance with the weight band removed

Sounds excellent  8)

« on: June 02, 2018, 07:11:26 PM »
There are photos and video clips on the Qld Vinduro facebook page

Location please

Competition / Re: VMX race number listing
« on: April 30, 2018, 12:34:28 PM »
727 David Lahey (Qld)

General Discussion / Re: Toll Warning $$$
« on: April 13, 2018, 10:11:51 AM »
I got a gateway bridge (Brisbane) toll avoidance charge for a QLD registered bike had I sold (and de-registered) 15 years previous. I phoned them and complained and asked them to look at the photo (the photos are usually automatically scanned for rego plates using image recognition software). They said the rego number had been read correctly, but that it was on a 4WD in the photo and they were NSW personalised plates.
Yes they dropped the charge

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