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Old August 20th, 2019, 06:24 AM   #41
jkv45
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MOTM - Jun '18, Oct '16
Quote:
Originally Posted by Zaph42 View Post
Hey were you guys there last weekend for the track day they did in place of the cancelled Lightning on the wolf races? Sounds like not many showed up. I was thinking of heading there myself but I couldn't make it. A lot of supermoto racers were pissed off that got cancelled. Not sure about the story or whose fault it was.

Weather permitting I'll be at the RA motorplex on this coming Sunday. Rare weekend track day there. If you guys make it say hi to the old man on the little red Z125.

I was at RA motorplex checking out the supermoto races they put on during ARHMA/Rockerbox weekend. Quite a crowd there racing.
Yes he was there, I was not.

He hasn't mentioned RA this weekend. Luckily he can skip out during the week at times and do a RA track day.

I'm sure you will cross paths with him eventually. His name is Kevin and you know his CRF and gear.

I'll tell him to look out for a fast guy on a Z125 passing on the outside!
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Old August 20th, 2019, 09:10 AM   #42
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Haha I'm not that fast anymore, Haven't been on a race bike since 2016. But if I see a crf150R with skid marks from a 450, I'll say hi.
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Old August 21st, 2019, 11:04 AM   #43
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MOTM - Jun '18, Oct '16
Running a track day at RA today (Wednesday) - must be nice!

My boss would never let me take a day off in the middle of the week to play at the track - and I'm self employed!
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Old August 22nd, 2019, 07:29 AM   #44
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Anyone have an idea of a good lap time at the RA Supermoto track?

My son said he was running 0:59 laps on a clear track yesterday, and was passing 450s. He was pumped.

Only thing on the track faster was a 125cc 2-stroke shifter kart, and it wasn't much.

Time to enter some races and get some real perspective.

The 150 is starting to chew-up its bottom end bearings, so a new crank is on the list before next season. Surprisingly it's still running strong, but its days are numbered.
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Old November 25th, 2019, 07:56 AM   #45
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MOTM - Jun '18, Oct '16
Current state of the CRF's engine -



Ready to install a new crank and high compression piston. Cam and bore look great. Crank replacement is more preventative maintenance considering how the engine was/wasn't taken care of before we got it. If you wait too long you'll end up with a hole in the cases.

I'm impressed with these little engines. It spends most of it's time at the track near the rev limiter, and after a season of trackdays shows almost no wear on the internals. Probably could have gone another season without much of anything.

My son is designing a velocity stack for the carb to have 3D printed. The airbox looks like a big compromise, as it has a stiff rubber boot that jogs awkwardly around the shock spring and makes jetting changes difficult.

So far so good...
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Old December 2nd, 2019, 07:38 AM   #46
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Finished assembling the bottom-end this weekend -



Just need the high compression piston assy and we should be able to button it up.
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Old December 4th, 2019, 07:04 AM   #47
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Piston came yesterday -



Hopefully have it together this weekend.
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Old December 8th, 2019, 12:27 PM   #48
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Got it back together and in the frame this weekend.

Fired right up and ran decent. Took it for a little spin in the neighborhood.

My son is designing a tuned velocity stack to replace the air box, and there will be some tuning to do when that's fitted.
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Old May 4th, 2020, 06:59 AM   #49
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My son had the CRF150R out on the USAir track in Shawano, WI, yesterday, and he said it was stronger than ever with the high compression piston and rebuild. More low-end pull and lifted the front where it didn't before. New Bridgestone slicks as well, but the track was pretty green and a bit slippery in spots. Lap times were 2 seconds quicker than last time out in the fall and under the times for the last race winner.

That's the good news.

The bad news is he chopped a corner too tight, caught the peg on the curb, lifted the rear and low-sided. No big deal except his leg got caught and twisted significantly, which led to a trip to the local ER. Now back at our house waiting to get an appointment with the Ortho Doc. Pretty sore all over. That leg already has a plate in it, and he may need more work.

But the bike isn't too bad....

Last futzed with by jkv45; May 4th, 2020 at 09:29 AM.
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Old May 5th, 2020, 11:31 AM   #50
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The 150R (front) and 450R before the incident -



I haven't had a chance to look over the 150, as it's back at his house, but he said there wasn't much damage. Gotta love Supermotos that way!
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Old May 5th, 2020, 02:37 PM   #51
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On my old CRF450 I had replaceable puck sliders on the axles. They had the main aluminum assemblies and the delrin inserts. I bought the inserts in a six pack and they were easily replaceable. Up on the handlebars it was just a protective Moose racing metal bar. That thing was the most crashable bike there ever was. I could pretty much lay it down and laugh about it.
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Old May 11th, 2020, 02:31 PM   #52
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Sample of the USAIR wicked curbs from one of my videos.

And then a sample of what I wish all track curbs looked like.
Attached Images
File Type: jpg USAIR-curb.jpg (113.7 KB, 4 views)
File Type: jpg Catalunya_nice_curb.jpg (118.1 KB, 4 views)
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