JBC

[Blue]

It would seem that my rear shock is too stiff  I'm only getting 14mm of movement when I sit on the bike . Not sure if it's the setup or the wrong shock or I need to change the spring

[markfoggy]

To be honest, 14mm of sag when you are on it is not far off ideal. Static sag with just the weight of the bike in the 5-10mm area could be pointing at a good start point for spring rate.

[Blue]

Took measurement with wheel off the ground then back on the ground the difference was 14mm. Then sat on the bike & took another measurement & the difference was 16mm

[markfoggy]

Ok, that sounds a little soft. Needs to be about 5-10 with just the bikes weight. What we haven't talked about is where you have the preload  collars set on that spring.

At this point I would back the collars off as much as possible and then move them to tension the spring about 10-12 mm of travel on the threaded part of the shock or if it works by a step change...similar. Then try again with the the static sag, which is as you described; wheel off the ground and then weight of the bike after a couple of bounces...look for that 5/10 mm again. If you can't get there...too soft.

Looking at the last photo, seems that you have the collars all the way at the top, try adding some preload and see if you can get it going where you want.

I'm thinking that maybe someone before you has wound all the preload out of it in an attempt to be able to take it apart. Maybe then they have realised that it will still need a spring compressor and given up.

Edited November 1, 2021 by markfoggy

[Blue]

I've been busy with the front engine mounts, now I'm happy with them I dropped the engine out in order to cut the right upper mount off. Once off I intended to move it forward and reuse it but the hole line is too close to the frame  so a chat with Yantosh (cheers ) has steered me in the right direction  tonight I made up part of the new mount, now I just gotta work out the best way to notch the frame

[yantosh]

a little bit at a time , electric die grinders can be had for reasonable money

[Blue]

I have one & a dremmel 

[Blue]

Had enough time last night to notch the frame 

[Blue]

Once all the engine mounts were it was onto the seat unit, I struggled with making up a subframe  trying to sort out angles & getting the seat right I changed things several times & decided to use a Duke subframe & cowl I had sitting in the shed. This ment I had to just make up a mini subframe for the Duke one to fit to. I'm not too sure even now but if it gets me on the road I'll change it later.

[Kamikaze]

On 10/13/2021 at 11:08 PM, Blue said:

 

Def like this tail more, the lines flow alittle better with the tank and frame.

[Kamikaze]

But the build is coming along nicely, i like the styling alot. wheels look great

 

[Blue]

I agree, things may change after sva 

[Blue]

Kamikaze you'll be pleased to know I've decided to go with the grey seat unit & modify it to suit the seat 

[Blue]

Seems like not a lots been done but I have fitted 7 fence panels/posts & boards  I've been sorting out the fibreglass on the seat unit. It's getting there