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General Discussion / Ray Ryan
« on: August 18, 2021, 01:50:38 pm »
It's hard to imagine..but today marks 17 years since Ray passed 
..R.I.P
..R.I.P
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Other Makes (CanAms, Coopers, etc) / Re: Rotax egines
« on: February 06, 2020, 04:50:34 pm »
In a snowmobile maybe.. 
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Tech Talk / Re: Reading a plug?
« on: November 26, 2019, 04:02:06 pm »
this from the Klemm Vintage page..
About “Plug Reading” - In the 1970s spark plug “reading” was a very commonly used means of fine tuning race engines. Sadly, this method was only valid for main-jet setting, and it required that the rider get a clean “plug-chop” (simultaneously shutting off from full-throttle, and hitting the kill button while at peak rpms in high gear). If you do not have a clean plug chop, the plug reading is useless. In later years, the real time deto-sensors introduced in the 1990s made plug reading a Neanderthal means of fine tuning, and no professionals do it anymore. It also bears noting that today’s pump gasolines (laden with oxygenates and varying ethanol percentages) do not “color” spark plugs nearly as quickly as race gas (or 1970’s pump gas). The long time it takes today’s pump gas to properly color a plug is even more reason to not bother with reading plugs. There is certainly validity to looking at the spark plugs on a regular basis just to confirm the there are no internal catastrophes in progress. But for fine tuning, plug reading is a process that takes up so much time and offers such questionable precision, no professional tuners rely on it anymore. Another tuning fable that still surfaces occasionally is that different areas of the spark plug tip/electrode are indicators of various low speed jetting ranges. This is absolutely untrue, and it always has been untrue.
About “Plug Reading” - In the 1970s spark plug “reading” was a very commonly used means of fine tuning race engines. Sadly, this method was only valid for main-jet setting, and it required that the rider get a clean “plug-chop” (simultaneously shutting off from full-throttle, and hitting the kill button while at peak rpms in high gear). If you do not have a clean plug chop, the plug reading is useless. In later years, the real time deto-sensors introduced in the 1990s made plug reading a Neanderthal means of fine tuning, and no professionals do it anymore. It also bears noting that today’s pump gasolines (laden with oxygenates and varying ethanol percentages) do not “color” spark plugs nearly as quickly as race gas (or 1970’s pump gas). The long time it takes today’s pump gas to properly color a plug is even more reason to not bother with reading plugs. There is certainly validity to looking at the spark plugs on a regular basis just to confirm the there are no internal catastrophes in progress. But for fine tuning, plug reading is a process that takes up so much time and offers such questionable precision, no professional tuners rely on it anymore. Another tuning fable that still surfaces occasionally is that different areas of the spark plug tip/electrode are indicators of various low speed jetting ranges. This is absolutely untrue, and it always has been untrue.
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Competition / Re: 2020 Classic Nats
« on: November 26, 2019, 02:20:51 pm »
Hello All.. any chance of a place like the complex at Nerong NSW being used for a Nats..? Multiple tracks.. facilities already on site.. shops showers toilets etc..multiple tracks can cater for many age groups of bikes.. track maintenance on site..? has a place like this been considered..?
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CZ / Re: Twinport Instruction manual
« on: October 08, 2019, 12:51:04 pm »
Michael..where is this listed.. on what platform..?
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Competition / Re: 2020 Classic Nats
« on: September 13, 2019, 01:42:11 pm »
John.. If there was a greater take up from riders from the "eastern states" to travel to WA ..we might consider.. but historically.. very few travel to WA
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Competition / Re: 2020 Classic Nats
« on: August 23, 2019, 11:47:07 am »
There was a whisper in the showers at Harrisville that "maybe" S.A...? Crystal Brook..?
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Competition / Re: 2019 July - Classic National Championships
« on: July 08, 2019, 10:55:13 am »
I think the Supp Regs state that there will be machine examining from 12 on Friday..
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KTM / Re: Penton Steel Tanker
« on: May 01, 2019, 10:09:13 am »
Bill... nobody will know more about the steel tank Penton / KTM than John..
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KTM / Re: Penton Steel Tanker
« on: April 26, 2019, 04:32:51 pm »
Bike came here imported by John Kirkpatrick..he was the KTM distributor.. raced by Allan Mitchell.. he is also the guy who raced the first yellow tank 250.. bike came as Enduro model.. with lights, speedo etc.. mid - side mount exhaust..centre stand etc.. not certain who made the exhaust pipe.. but was motocrossed with a down pipe.. was 5a engine.. alloy conrod.. which I managed to break one day at Manjimup.. tank was eventually painted yellow .. had chrome side panels on the tank..I raced in when I first started Juniors so 14-16 years of age.. which would make it 1972 when we had it.. so Allan Mitchell would have had it new in.. say 69 ish..? we sold it and bought a red fibreglass tank 125 with a 6B in it..where the steel tanker went .. who knows..
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General Discussion / Re: What rear shock spring rate needed for 4" travel? Any for sale or swap?
« on: April 25, 2019, 02:44:56 pm »
OEM on the early Husky's were 60 / 90 Girling springs..paint code on spring was green / blue / green IIRC
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KTM / Re: Penton Steel Tanker
« on: April 25, 2019, 02:40:51 pm »
There should be one on this side of the island..first "KTM" to come to Oz..tho..badged as a Penton..pic of me riding it in my I.D.
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Husqvarna / Re: '75 WR400 bits
« on: March 26, 2019, 10:32:05 am »
The 75 WR models got all the left over 74 parts.. as you all know by 75 the CR's were the GP frames.. so..the "Mag' swing in that bike is stock..
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Vintage Track / Kerr short circuit bike
« on: February 13, 2019, 10:53:00 am »
many years ago my father was friends with Kevin Kerr here in WA (still is) he started to build a short circuit bike and never ever finished it.. the sport died off here in WA mid project. The frame, forks are finished, it has a seat and wheels.. engine plates to suit a J.A.P engine and also gearbox plates as well.. all hand made in alloy .. Anyone interested in this..? If so , send me a message and I'll get some pics..
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Yamaha / Re: Yamaha HL500, Ideas and Variations of Building one.
« on: November 22, 2018, 10:55:55 am »
I know these posts are from a long time ago.. but.. where is the gear change on that Yamaha engine.. ?? rear brake on the left..