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Topics - vmxrider

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General Discussion / DT 200R Piston question
« on: July 01, 2020, 02:00:28 PM »
I'm helping a friend rebuild a 1990 Yamaha DT 200R.
It has a case reed engine, so the stock piston has no windows in the intake side.
The replacement aftermarket piston he has lists as being suitable for a 200 blaster (air cooled) and a DT 200R (water cooled). This piston has intake windows.
Want to make sure it will work before going down the path of rebore etc.
Any advice or suggestions?

General Discussion / Chrome plating Sydney...recommendations?
« on: May 23, 2016, 08:11:36 PM »
Have a pair of  handlebars I'm thinking about getting plated. Any recommendations in Sydney and rough idea of cost?. 

Tech Talk / 2 stroke vs 4 stroke big end size
« on: April 29, 2016, 03:15:23 PM »
Maybe a silly question, but why do 4 strokes have much larger big ends/crank pins than equivalent capacity/horsepower 2 stroke big end. I think Husky's might be the exception.

Tech Talk / Honda CR 125M rod kits
« on: March 27, 2016, 03:37:31 PM »
74-77 OEM rods/kits are hard to come by, anyone know of an alternative that doesn't require too much machining to fit ?

Suzuki / RM 125 pipe at MCA Auburn Sydney
« on: February 21, 2016, 03:26:34 PM »
Wandering around MCA today and this caught my eye. Maybe of use to someone. Header looked a bit small for a 125, so maybe for an 80cc? I have no idea.

General Discussion / Took the IT for a spin on Saturday arvo......
« on: November 29, 2015, 07:59:08 PM » ended up in front of Sydney Town Hall with a flat front tyre. Luckily had the gear to fix it and was going again in about 20 mins.

Tech Talk / Machining brake drums
« on: July 16, 2014, 08:32:32 PM »

Tech Talk / Reclaiming flogged out Honda cam bores
« on: July 06, 2014, 05:50:17 PM »
Here's how this guy has done it on an XR 75, same principle for all Hondas that have cams running directly in the head.
Have a look at the picture in his add.

Tech Talk / Hard facing rocker arms
« on: April 20, 2014, 03:07:52 PM »
Need a pair of XL250 rocker arms hardfaced and ground, anyone know who can do this in Sydney and what it might cost?

General Discussion / Old dogs new tricks
« on: September 19, 2013, 09:07:41 PM »
Occasionally I get to ride on a "modern" track (Mt kembla, Appin Louee ) and most of the young guns seem to whip over most of the larger jumps and make it look easy. I'm still not too afraid to hit jumps at speed but for the life of me can't get anywhere near what might be even the slightest whip to happen, instead I seem to default to the classic cross up style. I've watched other riders, videos and read about how to whip, but just can't get it. Tried it on modern bikes and old bikes. At 53 I'm probably to old to be reprogrammed and will just have to be content with being a gumby.

General Discussion / Air filter oil
« on: August 31, 2013, 10:57:12 AM »
I always used cheap engine oil, is there any real advantage in the expensive sticky stuff which seems to make the filter harder to clean? I usually clean the filter in truck wash for a while then rinse in warm water and let dry for a few days before oiling.

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