What have you made

7/17/2013 2:03pm
bike stands that raise, over worked piece that goes between fender and front wheel for transportation, tool for retainer ring on rear wheel, special chain guide to work better with larger rear sprocket, and lots more. Next up is a case saver that attaches to the frame for support, and a steering damper mount that works with my zeta top clamp
Dirtydane
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870
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5/24/2010
Location
SE
7/17/2013 2:06pm
Funny thread, nice idea!

Hope some more creative people post photos.
FreshTopEnd
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12524
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8/16/2006
Location
Sacramento, CA US
7/17/2013 2:13pm
A really crappy stand in metal shop when I was in the 11th grade. I would say technique in laying a bed was, ahhh, rough. But it worked.

The Shop

mx317
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4794
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4/1/2008
Location
TN US
7/17/2013 2:14pm Edited Date/Time 7/17/2013 2:20pm


I built this from the ground up. Silencer came from newmann (thanks again).



I didn't like the plastic guide that screws to the number plate and made this guide bracket.
FreshTopEnd
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12524
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8/16/2006
Location
Sacramento, CA US
7/17/2013 3:00pm
I'd like to see Dogger315 post some of his handiwork here. Don's work is off the charts.
2T42
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753
Joined
9/16/2009
Location
Zweitakt, IN US
7/17/2013 3:04pm
My greatest engineering achievement so far is a super high tech portable wireless battery powered high velocity fan for Redbud last year to cool off in the 105 degree heat after my race.

All while drinking a PBR, I Hot glued a used 5 gal paint stick to a 4" computer fan, gorilla duct taped to a clamp on style bendy umbrella holder so I could attach to my chair. I ripped some speaker wire off the by nines and hooked to fan and attached an emergency/exit light battery.

I had cool air for that whole night and the next day on the hill watching the pros and having a beers.

This is not a gorilla tape or hot glue commercial nor am I associated with either company. Any licensing agreements should be sent to my agent for review.

Don't hate

flarider
Posts
25498
Joined
4/1/2008
Location
Daytona Beach, FL US
7/17/2013 6:31pm
flarider wrote:
Some small business
newmann wrote:
"you didn't build that"



Smile
You're right, I pay people to do it
NP301
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2671
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1/19/2010
Location
Keene, NH US
7/17/2013 6:38pm
I made a clutch lever in my schools machine shop.
slipdog
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10039
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7/25/2009
Location
Nor Cal, CA US
7/17/2013 6:47pm
Coolest things I ever made was were these 2-stroke turbo cranks, of course I was trained and instructed by the original designer "Dr." Dave Myers of CPE racing.




1
mx_563
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2106
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4/1/2008
Location
CA US
7/17/2013 8:57pm
What's the deal with that "turbo" crank? Overall weight? Balance? Performance? Let's hear it....
FIREfish148
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5467
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1/20/2009
Location
Kirkland, WA US
7/18/2013 1:07am
slipdog wrote:
Coolest things I ever made was were these 2-stroke turbo cranks, of course I was trained and instructed by the original designer "Dr." Dave Myers of...
Coolest things I ever made was were these 2-stroke turbo cranks, of course I was trained and instructed by the original designer "Dr." Dave Myers of CPE racing.




Wow that's fkin cool man. Never heard or a turbo crank before.
Gazza
Posts
91
Joined
6/16/2010
Location
NZ
7/18/2013 5:25am
The trailer I just bought is the first ever, always made them in the past. Made myself plenty of handlebar mounts / raisers, guards and in general plenty of bike components.

I also designed and made a heap of prototype parts for this little beasty:

It was my job though...
brocster
Posts
3932
Joined
6/9/2009
Location
Aliso Viejo, CA US
7/18/2013 6:11am
power valve spacers, case savers, sag tools, skid plates, stands, custom painted helmets....
slipdog
Posts
10039
Joined
7/25/2009
Location
Nor Cal, CA US
7/18/2013 6:57am
mx_563 wrote:
What's the deal with that "turbo" crank? Overall weight? Balance? Performance? Let's hear it....
After the machining process the correct amount of heavy metal is pressed back in to re weight and balance the crank back to stock specs. Each crank is different, and some require going through an annealing process to complete the machine work. Any stock balance holes are stuffed with Nylatron to compensate for any volume loss.

Long story short, these are the only true "turbo" cranks that I know of even though many companies have use the term loosely in the past. Some have cut slots in the crank webs, some have notched the halves like a saw blade and Eric Gorr even talks in one of his books about ones with little scoop like paddles epoxied to the webs that eventually disintegrate and destroy the motor. For those that have heard of them, most picture the ones in Gorr's book and are skeptical, but Eric and I have talked about these many times. He remembers seeing these when he tore down Lowell Thompson's mod bike for a protest from Larry Ward at LL's in the early 80's. He said they were so concerned about the cylinder being a 105cc that nobody else looked at the crank, when we saw it he covered it with a rag since it wasn't illegal and cleared Lowell's bike as legal.

In a nutshell, the crank halves are machined in a custom jig to create a centrifuge. The crank acts like somewhat of a "turbo" by creating vacuum in the center to help pull fresh air/fuel mix in. Then exhausts it directly up the transfer ports when they open to help charge the intake phase.
danman
Posts
1204
Joined
4/1/2008
Location
Readstown, WI US
7/18/2013 8:30am
mx_563 wrote:
What's the deal with that "turbo" crank? Overall weight? Balance? Performance? Let's hear it....
slipdog wrote:
After the machining process the correct amount of heavy metal is pressed back in to re weight and balance the crank back to stock specs. Each...
After the machining process the correct amount of heavy metal is pressed back in to re weight and balance the crank back to stock specs. Each crank is different, and some require going through an annealing process to complete the machine work. Any stock balance holes are stuffed with Nylatron to compensate for any volume loss.

Long story short, these are the only true "turbo" cranks that I know of even though many companies have use the term loosely in the past. Some have cut slots in the crank webs, some have notched the halves like a saw blade and Eric Gorr even talks in one of his books about ones with little scoop like paddles epoxied to the webs that eventually disintegrate and destroy the motor. For those that have heard of them, most picture the ones in Gorr's book and are skeptical, but Eric and I have talked about these many times. He remembers seeing these when he tore down Lowell Thompson's mod bike for a protest from Larry Ward at LL's in the early 80's. He said they were so concerned about the cylinder being a 105cc that nobody else looked at the crank, when we saw it he covered it with a rag since it wasn't illegal and cleared Lowell's bike as legal.

In a nutshell, the crank halves are machined in a custom jig to create a centrifuge. The crank acts like somewhat of a "turbo" by creating vacuum in the center to help pull fresh air/fuel mix in. Then exhausts it directly up the transfer ports when they open to help charge the intake phase.
I've seen motors with one version of the turbo crank in action! It works, especially when the rest of the motor and jetting is tuned. Everyone was wondering how this guys bikes were so fast!
danman
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1204
Joined
4/1/2008
Location
Readstown, WI US
7/18/2013 8:30am
I made a bike carrier for the trailer hitch to use on the back of my pickup truck. It incorporates a Bike Shoe to hold the...
I made a bike carrier for the trailer hitch to use on the back of my pickup truck. It incorporates a Bike Shoe to hold the bike, so no straps. I also built in a stabilizer for the unit so the carrier and the bike are rock solid during transport, unlike any other unit out there. Total cost was under $100 including the Bike Shoe.
hvaughn88 wrote:
would you mind posting some pics of the carrier? I'm gonna build one too and would like to see some other ideas/designs, too. Thank you
Come on Paw Paw, out with pics. I've been thinking of doing this as well.
TX24
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2768
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5/7/2010
Location
San Antonio, TX US
7/18/2013 9:00am


Here's a simple tool I made. Borrowed the idea after seeing some suspension techs in a shop using it. One can use it to remove the inner fork chamber cap on some KTM and Yamaha forks with the slots in them.
newmann
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24443
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4/1/2008
Location
US
7/18/2013 9:21am
TX24 wrote:
[img]https://p.vitalmx.com/photos/forums/2013/07/18/27338/s1200_DSCN32570003.jpg[/img] Here's a simple tool I made. Borrowed the idea after seeing some suspension techs in a shop using it. One can use it to remove...


Here's a simple tool I made. Borrowed the idea after seeing some suspension techs in a shop using it. One can use it to remove the inner fork chamber cap on some KTM and Yamaha forks with the slots in them.
Cool. I see numerous uses for that
slipdog
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Location
Nor Cal, CA US
7/18/2013 9:45am
TX24 wrote:
[img]https://p.vitalmx.com/photos/forums/2013/07/18/27338/s1200_DSCN32570003.jpg[/img] Here's a simple tool I made. Borrowed the idea after seeing some suspension techs in a shop using it. One can use it to remove...


Here's a simple tool I made. Borrowed the idea after seeing some suspension techs in a shop using it. One can use it to remove the inner fork chamber cap on some KTM and Yamaha forks with the slots in them.
newmann wrote:
Cool. I see numerous uses for that
I have several different wrenches either ground down or "modified" with pin holes like that. I keep them all in one drawer labeled "KTM tools"... Wink
TX24
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Location
San Antonio, TX US
7/18/2013 9:50am
I have one of the Race Tech fork cap wrenches, but I can't use both ends at the same time.
slipdog
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10039
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Location
Nor Cal, CA US
7/18/2013 11:06am
Not a fan of aftermarket spring perches unless its for SX applications only. I do like what appears to be your concept though. Are those intended to be adjustable using different OD shim sizes? Kind of hard to tell from the photo.
jhansen510
Posts
2398
Joined
2/10/2009
Location
GREENFIELD, MN US
7/18/2013 11:07am
slipdog wrote:
Coolest things I ever made was were these 2-stroke turbo cranks, of course I was trained and instructed by the original designer "Dr." Dave Myers of...
Coolest things I ever made was were these 2-stroke turbo cranks, of course I was trained and instructed by the original designer "Dr." Dave Myers of CPE racing.




Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I think Jr. Jackson did the motor. It had the fins on the crank webs and was really really fast. I cant imagine the perfomance of that beauty you got there. That is impressive man! Do you run one on your bike?
slipdog
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10039
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Location
Nor Cal, CA US
7/18/2013 11:18am
jhansen510 wrote:
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I...
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I think Jr. Jackson did the motor. It had the fins on the crank webs and was really really fast. I cant imagine the perfomance of that beauty you got there. That is impressive man! Do you run one on your bike?
I always did in my 125's when I was racing and I have a project YZ144 motor with one and micro polished internals waiting for the rest of the chassis to be finished. I can't speak to any other design, but these make a bike stupid fast!
dl117
Posts
1548
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2/8/2007
Location
Cambridge, MN US
7/18/2013 11:44am Edited Date/Time 7/18/2013 11:44am
jhansen510 wrote:
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I...
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I think Jr. Jackson did the motor. It had the fins on the crank webs and was really really fast. I cant imagine the perfomance of that beauty you got there. That is impressive man! Do you run one on your bike?
Holly shit.....I have know Pat since we were on 50's together bad in 198...something..other people admit knowing him!!! LOL...
jhansen510
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2398
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2/10/2009
Location
GREENFIELD, MN US
7/18/2013 11:52am
jhansen510 wrote:
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I...
Slipdog I used to ride with a guy named Pat Donahoe who had a bike with a turbo crank. It was a 125 RM and I think Jr. Jackson did the motor. It had the fins on the crank webs and was really really fast. I cant imagine the perfomance of that beauty you got there. That is impressive man! Do you run one on your bike?
dl117 wrote:
Holly shit.....I have know Pat since we were on 50's together bad in 198...something..other people admit knowing him!!! LOL...
Dude is a character no doubt. Chip was or is to. Not sure if he is still around or not. But yea pat had one of them cranks on his bike and it was a rocket! Do they work on 4 strokes to Slippy or just 2 bangers? Definitely post up that RM when you get her track worthy! You build some wicked stuff man!
slipdog
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10039
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Location
Nor Cal, CA US
7/18/2013 12:11pm
jhansen510 wrote:
Dude is a character no doubt. Chip was or is to. Not sure if he is still around or not. But yea pat had one of...
Dude is a character no doubt. Chip was or is to. Not sure if he is still around or not. But yea pat had one of them cranks on his bike and it was a rocket! Do they work on 4 strokes to Slippy or just 2 bangers? Definitely post up that RM when you get her track worthy! You build some wicked stuff man!
Unfortunately they don't work on 4-strokes or I'd still be pumping them out. As strong as at is here on Vital, the 2-stroke market died out when I was going into full swing with them around '06-'07. Most of the interest around then was from mini dads wanting them done for free for their next "Ricky Carmichael". Dr. Dave had retired and wanted to sell me the jigs, tooling and his black book with 30 years of development specs, but I just couldn't justify the investment in that when the future was 4-strokes. Sad, but true...

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