165 replies to this topic

[opus]

I had to grind the bolt head thinner so it would clear the shock eye, then I installed the lengthened bracket into the frame, then bolted the shock to the bracket.

That's what I needed, thanks!

I also kind of figured that out/assumed last night after talking with the welder husband of a friend's cousin. He's going to weld that up for me tomorrow. We'll see how it goes.

Thanks for the reply!

opus

[D4N]

I just finished this mod on my fourth gen. I followed this post almost exactly and it worked fine for the 96. The washer does not fit so it was left off. I made my extension 41.5 mm which is 2.5mm over stock. There is absolutly no room for anything longer, at least on a fourth gen bike. Huge improvement over stock!

Edited by D4N, 14 July 2008 - 07:40 AM.

[rickdick80]

Hi all! I've read through this thread a couple times and would like to do this mod over winter. I have a '99 VFR that is all stock as far as this mod is concerned. I do have a couple questions though:

929 questions
The 929 shock reservoir is nice and far from the exhaust, but does it require trimming the battery box? It sounds like yes; can anyone confirm, or perhaps tell me how much the battery box needs to be trimmed? I don't really feel like trimming my battery box.
Are the compression/rebound adjustment screws accessible when everything's installed?

954 questions
The 954 shock reservoir sits very close to the exhaust (less than an inch) but this might not be a real problem.
The 954 spring is stiffer than the VFR/929 spring, yes?
Does the 954 shock require any bike modification other than the upper mount?
Are the compression/rebound adjustment screws accessible when installed?

[Peto]

The 954 spring is stiffer than the VFR/929 spring, yes?

Nope. The 954 spring is softer. See post #4.

[timmythecop]

just installed a 929 shock last night and it was a breeze. I used a thick axle spacer for my extension and it was 45mm, so I left it as it was.

The only different things I have to add are:

* the 929 spring really isnt stiff enough, but will do for now (as BR stated) I had to wind up the pre-load 4/5ths of the way up just to get a baseline.

* I didnt have to trim anything on the undertray

* looks like 45mm is the limit before the bottom eye touches the linkage

* this is really the best modification for money/time vs results

* I did weld the bolt to the bracket ( to ensure that everything remains concentric)

the bike was instantly much better. Instantly familliar and confidence inspiring. sorta like when you take off trashed tyres and notice how good a new set feels, but times 10.

I havent set the shock up yet becaused I had a team of mechanics tapping their toes, waiting on me to finish so they could close up the shop and go home.

[Veefer800Canuck]

You must be heavier than Honda's test-riders, because the 929 spring rate is the same as the 5th gens.

[thereisnospoon]

I just purchased a 929 with a white spring (faster, and goes with my Erion slip on, lol) and I'm looking forward to doing this and seeing what difference I feel. I'm also at almost 45k miles on the stock shock... so with all this info and a decent price why not http://www.vfrdiscus...tyle_emoticons/default/smile.gif I do like the "plush" (most seem to argue undersprung) feeling of these bikes... but a bit more "bite" would be nice.

Timmy is this all you have done so far or have you put different springs in the front?

[timmythecop]

havent done the front yet, I,m waiting for thermosman to steer me in the definitave direction (and help with parts). prolly going to do the F3 cartridge swap with some good springs and fresh oil (obviously)

I am heavier than a honda test rider because those guys are about a buck o five wet and I am 220. Plus, who knows how old the spring was???

[seamus]

havent done the front yet, I,m waiting for thermosman to steer me in the definitave direction (and help with parts). prolly going to do the F3 cartridge swap with some good springs and fresh oil (obviously)

I am heavier than a honda test rider because those guys are about a buck o five wet and I am 220. Plus, who knows how old the spring was???

Can you post up what Thermosman's answer is when you get it? I was going to call him this week but got sidetracked at work.

Edited by seamus, 22 November 2008 - 07:17 PM.

[CitizenOfDreams]

So... I decided to follow the trend and replace the rear shock on my 4th gen VFR with a newer CBR929 part. Here are the measurements I got:
- 4th gen VFR shock, eye center to eye center fully extended - 324mm
- CBR929 (yellow spring) shock, eye center to eye center fully extended - 288mm (36mm shorter)
- 4th gen VFR shock bracket, eye center to top surface - 25mm
- New bracket to be made, eye center to top surface - 61mm
Any corrections and suggestions would be greatly appreciated.