I'm being told that the F3 / PC31 came with alternate suspension linkages. One uses a 100mm centre to centre dog bone and another that uses a longer one. I have the 100mm and I'm looking for a shorter one that will fit and raise the tail of my bike. Anyone know of one?

 

This is one I just found searching for cbr f3 risers I was looking for handle bar conversion kits. I swear I have seen several company's that make what your looking for BikefarmMV E-Shop tail riser (raiser) motor bike

 

you can get adjustable dogbones for about 70 bucks on ebay.

 

I've emailed to ask which PC31 they are designed for as 95/96 is a different part number to 97/98 and I'm told different sizes.

 

They are lowering kits with the highest setting being standard unfortunately.

 

here is another one i found. Its a kind of confusing site but i think they might have what you need Honda CBR 600 F3 03 Suspension - Tail Riser Kit Parts at Wemoto - The UK's No.1 On-Line Motorcycle Parts Retailer

 

I belive that the 97 98's sat a little higher? I dunno if this is a result of a suspension change or if it was just a dogbone tweak, either way Im sure both would work or you could take it to some machine shop with some rough dimensions and get a custom one made up for you.

 

Update:

Wemoto sell TRW risers which only rise on 95/96 which had a longer dog bone. I bought one of these because it doesn't say anywhere that they only work with the early F3's. When I got in touch with TRW they went and checked and confirmed they don't work with the later models as the later models already have this length of dog bone (with different fulcrum).

The BikefarmMV people say they do parts for either model. I will ask them to confirm dimensions to make sure. As they offer a variety of lifts they may be the answer to achieve optimal geometry.

I have also ordered from eBay used dog bone assemblies from early F3 and an F2 as they were only a few pounds/dollars so I can check if it's possible to use the early F3 fulcrum with a late F3 dog bone to achieve the lift, or maybe F2 parts.

I'd really like one of the adjustable types available in the US but these seem to be only capable of lowering. Think that's a US thing - we have cruisers in the UK too but don't make them out of sports bikes!

 

In case anyone is interested I bought a 95/96 link kit off eBay for a few pounds/dollars.

The 95/96 has a longer dog bone and shorter rocker piece. I "think" the rocker is the same leverage ratio as the later models - looked the same but doh! I forgot to measure. Fitting the earlier rocker and dog bone resulted in a 1" lift measured from wheel spindle to last subframe bolt hole.

I don't know what effect this will have but hope to try it at the track next weekend. I'll take the original in case it's bad. I have already slid the triples down the forks an inch so the combination may be a bit extreme but these are low powered bikes so could be ok. If I'm lucky I'll have a fast turning bike, if not it'll have lost rear grip, be unstable and do stoppies instead of stopping!