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Messages - John Orchard

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Competition / Re: 2019 July - Classic National Championships
« on: June 17, 2019, 05:39:47 PM »
Nope not coming, l'd love to but too much costs, on top of fuel to get there. l blew all money racing when l was younger, have nothing left now.

Wanted / WANTED - DT/RT 1,2,3 swingarm.
« on: June 14, 2019, 12:38:46 PM »
I want to experiment with some mods to a swingarm, but don't want to cut-up my existing item. Would later DT250, 360, 400 also fit/look the same?

Yamaha / DT1 tank badge screw size?
« on: June 10, 2019, 03:35:56 PM »
Anyone know what size screws hold the tank badges on on a DT1.  Measuring old screws I have that tend to screw in are m3.5 dia, and guessing a .60 pitch (smaller than the .80 thread gauge I tried on it).  I have no experience in such small size.

I am needing to buy some new countersunk screws for the thinner than stock badges that I have.

Kawasaki / Re: KLX 250 Standard Needle or replacement
« on: June 09, 2019, 09:37:48 PM »
What is the number of the needle in it?

Tech Talk / Re: Filing throttle slides, richer.
« on: June 09, 2019, 09:20:22 PM »
Well l filed the slide, easy, no problems, l actually filed-off more than the engine ended-up needing (made it too rich at 1/8th throttle), so l just filed the cutaway a bit to bring it back  :-)

The slide (that now travels downward further) didn't touch the needle-jet (NJ) shroud, but l flatened the angle on the bottom of a 7mm drill-bit and gave the underside of the slide a recess for more clearance from the NJ, just incase l find, at some time in the future, that l have to run the slide lower at idle.

One thing to keep in mind, as the slide centre (the bit that holds the needle) sits lower (equal to the amount you file-off), the needle will sit lower into the NJ, l had to change the clip position from groove 3 to groove 5 (bottom groove) to keep things equal.  Should l ever need to raise the needle further in the future, l'll just put a shim-washer under the clip :-)

My filing may (yes it was) have been a little uneven at first and my idling rpm was all over the place, a few strokes on some course emery-paper to get it square, got things right and she runs so sweet now.

So there you go, don't be afraid to experiment :-D

General Discussion / Re: 2019 Broadford Bonanza
« on: June 07, 2019, 09:47:42 AM »
Maybe only ride on a classic track but have Pro modern racers put on morning & afternoon display riding sessions on the modern track but make the track more spectacular: will keep the kids entertained (kids that have little interest in vintage bikes).

General Discussion / Re: 2019 Broadford Bonanza
« on: June 06, 2019, 10:18:37 AM »
G'day Rob,

You get lots of riders on the roadrace track because your average classic bike owner rarely gets a chance to take their bikes casually on a track, l think the same for dirt track & speedway owners, motocross riders have lots of nicely prepared tracks as options, so you really need something special for the owners to risk paying to wear-out their classic bike, that took lots of time & money to build.

Yeh sure classic riders, be them road, mx or speedway, all want to show their bikes off to other enthusiasts and meet old friends.

Broadford has fantastic facilities but the track is a gamble (based on previous years) as to what condition it is going to be in. Tight-arse, old-timer mx riders will not pay the money to be greated with poor conditions.  Not such a concern for the other arms of the sport.

It all starts with mx track preppers that don't study the weather forecast for a start, then the road riders (a few) complain about dust blowing over the hill from the mx track (which most blows up from the carpark areas) then the patchy sprinklers are turned on and riders are then greated with mud, dust, mud, dust but worse is that Broadford dirt can be like ice once it is has just been watered.

The track was at its best about 4 or 5 years ago when the then Manager (Marty) had spread a lot of wood-chips around the track, this kept the moisture in the ground and prevented it from forming concrete ruts.

You cannot expect vintage riders to be happy riding a modernish track (table-tops, steep up/down ramps, step-ups / step-downs). So it's a combination of things but the track plays a big part. l remember a couple of years back, there was a great Bonanza turn-out of mx riders when there was a 'Pre 75' grass-track (which was dusty as hell and miles too small) offered to riders; there were heaps riding that track (proves that the offer of the right track brings the riders).

l seem to remember a couple of years back, a rally-car circuit was graded-in where the enduro (shitty ground when not prepared) track was, this track would be easy for a water-truck to drive around, plus dust from that area might not blow over the roadrace track? That track would be perfect for classic bikes! l even think that you cold run mx bikes on ONLY that track, forget about the modern track. l remember riding the 'Channel 0 track' there back in '76? (real dusty)

Spectator wise, the road & speedway get them because they have riders & bikes fo them to look at, l guess we all realize why the mx track doesn't bring in spectators if there are no riders. Maybe offer free entry if you bring a bike to show?

Personally l think the track needs more mulch, thought put into where the water will pool if rain or over watering occurs, in the lead-up to an event the track should be ripped & watered (if no rain forecast) then rolled, rolling it should keep in the moisture in and help water run off should it rain. Rolling it will lessen the ruts forming and keep the track smoother for old bikes.

The BIG mistake that the governers of the sport make is they ask the existing riders/racers what they think the sport needs, obviously if they are still competing they are pretty happy with things the way they are ...... speak to those that do not race/compete anymore.

l guess you just need to get a reputation for preparing a good track, spectators that see a mud-fest at the Nationals, aren't going to be in a hurry to ride the track  :-)

After typing all this l have talked myself into believing that the long rally-car track is the answer, l know that l & many others would come and help prepare it & give input for it.  Trust me, build it and they will come.

Tech Talk / Re: Keihin PWK38/40 slide cutaway measurements
« on: May 28, 2019, 09:48:01 AM »
Where are you getting your slides from John?

FWIW I have a genuine pwk on my '84. I put it on to make it a little easier to start and was surprised at the extra grunt. Big difference.

l contact the various suppliers of Chinese PWK rebuild kits on ebay, l get them to measure the slide cutaway before l order, they are happy to do that, they send me a pic with their verniers in place showing cutaway :-)

Tech Talk / Re: Keihin PWK38/40 slide cutaway measurements
« on: May 28, 2019, 08:51:03 AM »
Al l was slow to get onto the PWK's, thinking "l can make the stock carb work ok", l did get the stock carb working ok, but l read so much on the internet that the PWK Airstriker (with air channel guides in intake bell) transforms the big CR's. l figured l'd give one a go once l saw them on ebay for only about $50, man it's only a block of alluminium that mixes fuel & air together, doesn't matter what country it was made in, l'll make it work.

The benefits of the flatslide really does make a difference over the stock aircooled round slide; she rips from the bottom-end so strong & quick (like the bike really needs that ?!!!!!).  Bigger buzz than any ride at a carnival ;-)

The PJ carb on the '85 CR, l read, to be a problem carb, like they say about the '84 round slide, any '85 l've ridden (125, 250 or 500) has always work well in my eyes.

Just get out and ride Al  ;-)

Tech Talk / Keihin PWK38/40 slide cutaway measurements
« on: May 27, 2019, 05:03:14 PM »
It took me a little while to compile the info, thought I'd share if anyone needs it. My carb is Chinese supplied and does not have any markings on the slides, hence the need for my homework  ;-)

I had a ping 'just' off closed throttle on my CR500, turned out to be slide cutaway.  In the PWK40 I am using, the carb came with a 7.0, it improved things going to a 6.0, then perfect with a 5.5.

Slide # -  Imperial  -  mm
5.5      -   .315"      -  8.000 (apparently PWK33 & 35)
6.0      -   .365       -  9.271
7.0      -   .385       -  9.779
8.0      -   .450       - 11.430

Competition / Re: 2019 July - Classic National Championships
« on: May 25, 2019, 06:06:50 PM »
ls Harrisville a marked-out & used track, or will it be fresh for the titles?

Competition / Re: 2019 Australian 3 Day Vintage Enduro
« on: May 25, 2019, 03:38:55 PM »
Where abouts can we see a list of what bikes people are riding and photos of the event?

Steve Davis on Facebook has been loading live videos.

Suzuki / Re: Rm125b forks
« on: May 23, 2019, 07:52:30 PM »
Where did you get the heavier springs from John

Racetech - Syd, YSS - Adelaide, l imagine any suspension could supply?

Suzuki / Re: Rm125b forks
« on: May 23, 2019, 09:19:41 AM »
On my 125B l just put in heavier compression springs to match my weight and found a shorter top-out spring, long top-out springs are needed to make intial travel more supple on air pressured forks. After that l was totally happy with them.

Tech Talk / Re: Ohlins nitrogen needle, buy from pharmacy?
« on: May 22, 2019, 09:16:47 PM »
Did you wear long sleeves when you asking for the needles :o ;D

They were very hesitant to assist me, gave me an odd face when l said that l want to pump my suspension up :-)

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