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Plywood seat base


vibrac

Well Known and Active Website User
VOC Member
I am not a pannier man but if I was then the Marcus rear slide in system is the one I would emulate
 

bmetcalf

Well Known and Active Website User
VOC Member
I am close to taking my long seat base, squab and cover to the upholstery shop.

0810191544.jpg

0810191546.jpg

I extended the angles to near the back edge for more support and was able to attach the arch between them because they had diverged enough, but had to trim the tabs to suit.

The sheet metal hump was extended by 3.5". I had to trim it a bit on one side to miss the bracket.

For screws for the tool tray slide, I decided to tap the angle reinforcement to avoid finding someone to weld on the nuts, per post #18 above. I had already drilled the full-size hole for one of them and had to use a nut on it. I used coarse screws, but would have used fine thread if I had planned better.

Because of manufacturing tolerances, the predrilled screw holes in the bracket didn't fall perfectly on the angle reinforcement. I ended up having to carve windows in the vertical leg of the angles in four places. I drilled a 17/64" hole and opened it up with this dremel bit: (I was pretty good at it by the time I got to the last one.) https://www.dremel.com/en_US/products/-/show-product/accessories/9906-tungsten-carbide-cutter

I should have tapped holes there, too.

0810191549.jpg
 

Dave61

Well Known and Active Website User
VOC Member
Has anyone used the long seat foam base from the Spares Co ?
Wondered what it was like comfort wise, especially for pillion passenger.
Cheers
Dave
 

bmetcalf

Well Known and Active Website User
VOC Member
We haven't used it yet, but the extra 3.5 inches has to be better for the pillionist.

If you make one, be sure and make the base .75" to 1" narrower than the foam, since the foam shrinks when compressed for attaching the cover to the base. Mine looks like it will rub through after a bit of use.
 

Dave61

Well Known and Active Website User
VOC Member
We haven't used it yet, but the extra 3.5 inches has to be better for the pillionist.

If you make one, be sure and make the base .75" to 1" narrower than the foam, since the foam shrinks when compressed for attaching the cover to the base. Mine looks like it will rub through after a bit of use.
Thanks for the advice Bruce, it`s appreciated.
Got to keep the Wife comfortable !
Cheers
Dave
 

BigEd

Well Known and Active Website User
VOC Member
VOC Forum Moderator
Has anyone used the long seat foam base from the Spares Co ?
Wondered what it was like comfort wise, especially for pillion passenger.
Cheers
Dave
I have used a Spares Co long seat for over 10 years and covered 48.000 miles. My wife has done many of those miles on the pillion and finds it comfortable.
 

vibrac

Well Known and Active Website User
VOC Member
I found the long seat higher like a series D seat height I got my tame upholstery to reduce the rider half to my existing seat height of course I was brought up in the forties so am no fifties Amazon or sixties giant
 

Dave61

Well Known and Active Website User
VOC Member
I have used a Spares Co long seat for over 10 years and covered 48.000 miles. My wife has done many of those miles on the pillion and finds it comfortable.
That's good to know Ed and a decent mileage covered.
Cheers
Dave
 

Dave61

Well Known and Active Website User
VOC Member
I found the long seat higher like a series D seat height I got my tame upholstery to reduce the rider half to my existing seat height of course I was brought up in the forties so am no fifties Amazon or sixties giant
I'm probably only buying the seat foam & cover to have a go myself.
Can have a sit on the bike before fitting the cover so can get the electric carving knife out if it needs modifying.
Cheers
Dave
 

Dave61

Well Known and Active Website User
VOC Member
The new seat looks much more comfortable.
The only drawback is that your wife will be riding pillion all the time.
No more Sunday morning back lane hooning.
You're probably right but she's a very good pillion & I do get let out on my own now & then.
 

A_HRD

Well Known and Active Website User
VOC Member
Dave,

If you go for the long seat option, just be aware that, depending on what rear damper you have and the position of the stay drillings in the rear mudguard, you MAY have issues with the lifting handle hitting the back of the seat! I did! First I rotated the lifting handle and re-welded the chainguard tab on t'other side. Still the problem existed. In the end, I cut the handle loop right off and plugged the remaining holes. I have a D stand:).

Just something else to watch-out for....

Peter B
 

Dave61

Well Known and Active Website User
VOC Member
Dave,

If you go for the long seat option, just be aware that, depending on what rear damper you have and the position of the stay drillings in the rear mudguard, you MAY have issues with the lifting handle hitting the back of the seat! I did! First I rotated the lifting handle and re-welded the chainguard tab on t'other side. Still the problem existed. In the end, I cut the handle loop right off and plugged the remaining holes. I have a D stand:).

Just something else to watch-out for....

Peter B
Thanks for the warning Peter.
I knew it could be an issue so when I made the attachments to fully spring the seat I built in a bit of adjustability.
Think it will be a case of doing it & then getting my wife & myself sat on it to check the clearance, don't really want to take the springs off to do the check, but if it looks dubious I may have to for peace of mind.
Cheers
Dave
 

Albervin

Well Known and Active Website User
VOC Member
Got my long seats from R K Leighton in Birmingham.
How do you find it regarding fit and comfort? I bought a Velocette seat from them and it looked superb. I needed to "fettle" it to make it fit but just some light tweaking of brackets. It was very comfortable and well made.
 

nkt267

Well Known and Active Website User
VOC Member
How do you find it regarding fit and comfort? I bought a Velocette seat from them and it looked superb. I needed to "fettle" it to make it fit but just some light tweaking of brackets. It was very comfortable and well made.
I've found both the seats comfortable and I no longer crush my delicate bits on the tank when applying the brakes with a pillion on board:eek:;)
 

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