- Bike Checks
5 gal buckets are made of HDPE. That's what you want. McMaster Carr will have HDPE in different sheet thicknesses. You can heat and form it easily, but you can't bond it. I wouldn't use PVC as it's more brittle and scars more easily as well. However,
Here are a couple of my mini's. Fun stuff. I seem to crash harder and more often on a 50 than a 250... SMH. QA 50 set up for mini Sumo.
Great story!!! IMHO, keep it stock and get it up into that house! Here's mine. That front Number Plate is going to be a tough one to locate.... Good luck!
I had a little more time to play in the shop. Turned a spigot for the carb boot and installed that. Also noticed that the boost bottle spigot at 90* doesn't really want to fit on the bike, so I cut and laser welded it back on at an angle. I wasn't going
LOL!!! Yes, rumor is that even though All-Balls makes great seals, they have a lot more drag than the RateTech seals. Either way, just replace the seal and be done.
That sounds familiar. It's been a while, but I think I might have had to leave one retaining ring out as well.
Well, I like playing with ports and engine building, so my time may be different than yours, in terms of "worth it". But yeah, I did the same on a YZ80 cylinder and it made a difference even with small Boyesen ports. The size of the port is limited by ... more »
New top end has been on the back burner for a while now. I ditched the modified YZ250 re-cast head idea. Might play around with this Sachs / Penton head if it runs hot. All I've done so-far is to have the cylinder welded so I could create boyesen ports,
I just sold my '87 after a few years of non serious racing and riding. I'm faster on my 125, but I'm starting to miss that beast. FWIW: I ran 92 pump gas and Spectro at 40:1. Never pinged after performing the "Yahoo YZ490 Group" carb mods.
That drain goes into a waste oil bucket, right? wink wink. I've seen worse oil, but that's pretty ugly. Are you revalving the shock?
175 - 200 psi should be good. As was mentioned, make sure the separator piston has about 2" of space above it for the nitrogen to compress. If you purge all the air out of it / fill it up completely, it won't move.
Max, I've thought of that too, but I get a little nervous putting so much heat into a precisely machined cylinder like a fork lower. With my luck it would end up binding at the end of the stroke or something! Both components changed in about 81 or 82. ... more »
Hey Mike P. Sweet bike! I've got a '79 YZ125 that I race and I've got a DLS front brake for it. I'm intrigued by your setup. I was waiting to machine a plate to relocate the 3:00 slot to the 1:00 position, but I see you went ahead and installed it with ... more »
Looking at my 125J, I would have to make a governor cover plate and eliminate the water pump. This is easy stuff and can be done with regular people's tools (I'm a machinist but sometimes I revert to the die grinder and hack saw when I don't have access ... more »
It's right side ignition, right? Spins clockwise? If they're on the same side, then yes. Yamaha has used the same backing plate mounts and shaft taper forever.
I'm not sure, but being a yamaha, it's a good chance. Take a look into partzilla and compare shaft end bearings and such...
If it were me, I would look into using the IT motor, cases etc, and drop the YZ125 close ratio trans into it if possible. If you want the 175 motor to wring out like the 125, then you will need to raise the exhaust port a little and rework the head for ... more »
Which rod is longer? If the YZ rod is longer, you could keep it and make a spacer to lift the cylinder so the piston meets the deck of the 175 cylinder. Or mill some off the top and bottom of the cylinder to get correct deck height. You'd have to adjust ... more »
Amazing work Heck! That pipe looks absolutely gorgeous!
I think his bike came out a little cleaner than you're KDX, Sir Roostalot! That's a great war story.