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Retro Thumper project (Read 1982 times)
Dave
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Re: Retro Thumper project
Reply #195 - 03/03/24 at 17:38:50
 
I put the engine in so that I can start bolting parts in place and work out the new parts I need to build to hold the battery, rectifier, air cleaner and to start building the mounts for the footpegs.  I will have to wait for the seat to make the upper frame and mount the fender.

Here is a photo with the parts set in place.  The seat is a bit too small and the GT550 seat will be longer.  The rear fender still needs to be moved forward and be trimmed a bit up front - I will have to flatten the front of the fender where it meets the frame so it can be pushed forward (The center of the fender is should be over the center of the tire).

After taking the photos I started installing the drive pulleys, belt and covers so that I can fabricate the footpeg mounts to work with those parts.
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« Last Edit: 03/04/24 at 03:17:08 by Dave »  

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Ruttly
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Re: Retro Thumper project
Reply #196 - 03/04/24 at 08:01:37
 
An amazing transformation ! I have to admit , I wasn’t thrilled seeing the same tank as Thumpin Special. But that’s all gone now I really like it. The wheels look right , love the fenders and that tank really has perfect dimensions, lines and shapes for the bike.Good job Super Dave. Continue !
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Ruttly
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Re: Retro Thumper project
Reply #197 - 03/04/24 at 08:15:51
 
What is that rear fender from ? Not for my BSA , just for future projects and reference. That is one sexy fender. Tempted but it’s not right for my 250SS. The BSA 250 SS in fully completed in my head , I see it , I sit on it , every little detail is done. But I just can’t change anything , it’s a finished product as is. The only thing I can’t see is the stance , its drivin me crazy !
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Dave
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Re: Retro Thumper project
Reply #198 - 03/04/24 at 09:14:14
 
The rear fender is from a Moto Guzzi California.
The front fender is Kawasaki KZ750.
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ThumperPaul
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Re: Retro Thumper project
Reply #199 - 03/04/24 at 16:41:34
 
Really awesome, Super Dave!

Is this you?
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Ruttly
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Re: Retro Thumper project
Reply #200 - 03/04/24 at 20:27:23
 
Who makes that cool wheel chalk ?

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Dave
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Re: Retro Thumper project
Reply #201 - 03/05/24 at 04:39:48
 
ThumperPaul wrote on 03/04/24 at 16:41:34:
Really awesome, Super Dave!

Is this you?


No.....this is more like I ride.
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Dave
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Re: Retro Thumper project
Reply #202 - 03/05/24 at 04:49:12
 
Ruttly wrote on 03/04/24 at 20:27:23:
Who makes that cool wheel chalk ?



These wheel chocks are great - they hold the motorcycle really well as the sides pinch together as the bottom swivels forward.

The original was made by Baxley Sport Chock.  They are well built and expensive.  I was able to buy a used one affordably and it was my first chock.  They work great in a trailer as you only need to use one bolt at the rear to hold it in place and keep it from sliding around.
https://baxleycompanies.com/products/sport-chock?variant=39329523663022

The copies are more affordable and come apart for shipping.  The red one I got on Amazon.  I made a threaded plate that is under the trailer floor and a bolt with a small "T" handle on top and it is quick to mount it in the trailer - or remove it and use it in the shop.
https://www.amazon.com/MOTOOS-Motorcycle-Front-Locking-Adjusting/dp/B09YRQMB4...

The only downside of using them for "building" a bike is the wheel in the chock is lifted a bit - so doing visual things like building fender mounts or bodywork and seeing how it looks requires you to block up the back wheel or get the bike on level ground.  Also the chocks are made for 130/70 size tires on modern motorcycles - thinner tires aren't held as secure....but the bike is still held upright.
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Dave
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Re: Retro Thumper project
Reply #203 - 03/05/24 at 04:54:30
 
I got my footpegs and brake pedal in the mail yesterday.

Now comes the time for fabrication.

I was going to wait until the seat arrived so I could get the pegs in a good place - however the mount to the frame has really only one place it can be located, and the outer mount has pretty limited location to clear the exhaust on the right and pulley/belt on the left.
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ThumperPaul
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Re: Retro Thumper project
Reply #204 - 03/05/24 at 05:15:49
 
Dave wrote on 03/05/24 at 04:39:48:
ThumperPaul wrote on 03/04/24 at 16:41:34:
Really awesome, Super Dave!

Is this you?


No.....this is more like I ride.


LMAO!  You need to hold your chin up!
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Gary_in_NJ
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Re: Retro Thumper project
Reply #205 - 03/05/24 at 07:36:43
 
I use one of those front roll-on front wheel stands for my cafe racer. I got one one Amazon. It works great, but do know that in order to remove the front wheel from the stand you have to do a quick compress-release of the front suspension and as the forks decompress you need to give a forceful pull-back on the bars to get the wheel to release from the stand. It does take some strength...and if you are an older rider that may be an issue. You could secure the stand to the floor which would keep it from sliding as you pull back...but that isn't very practicable.
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ThumperPaul
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Re: Retro Thumper project
Reply #206 - 03/05/24 at 09:06:32
 
Don’t get “stock in your chock”. Or is that “stuck in your chuck”.  Shocked
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Dave
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Re: Retro Thumper project
Reply #207 - 03/07/24 at 03:26:24
 
Over the last 2 days I was able to get some done on the foot peg mounts.

When I looked at the mounts for my RYCA rear sets, I noticed the bracket was bent at the mounts.  When the bolts are tightened the bracket is touching a frame weld on the tube that comes down from the seat, and tightening the mounting bolts bends the bracket.

To solve this issue I made some spacers to keep the mounts away from the frame weld.  I used stainless 1/2" rod to make the spacers.
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Dave
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Re: Retro Thumper project
Reply #208 - 03/07/24 at 03:27:44
 
Here is where the spacers are located to hold the mounts away from the frame.
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Dave
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Re: Retro Thumper project
Reply #209 - 03/07/24 at 03:30:22
 
Here is the mounting plate I cut out.  It is likely a bit oversize at the moment - I can cut it down once the outer plates are made and I know for sure where I need metal and what can be cut away.  Eventually I will weld in a tube between the left/right mounts so that when you stand on a peg the stresses can be shared with the other side - but for the moment it is nice to be able to install or remove once side at a time.
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