Ad closing in seconds....

Suspension advice : Yamaha Thundercat

MCN expert Chris Dabbs is here to answer any questions you have on anything bike related.

If you have any questions, ask an expert here

Q. I have just bought an '03 Yamaha Thundercat in pristine condition.
The bike is on factory settings and I would really like some advice on what settings I should have for the suspension? 

I am six feet five inches tall and 18 stone, and yes I do fit on the bike. I use the bike for commuting to work via a motorway, and for Sunday fun on more interesting roads.

With factory settings there is a lot of dive on the front end under heavy braking (as you would expect) and I don't have full confidence in the front end, but I do not have the experience to know what to adjust it to.

A. Although your bike’s suspension is designed to cope with the combined weight of you and a pillion your weight puts a disproportional amount over the front end, hence the fork dive.

Increasing the compression damping to one or two clicks off maximum will slow the rate it compresses, but upping the spring preload won’t stop it diving excessively. You need to invest in some stiffer springs with fresh fork oil that matches them. A new set of WP springs and oil fitted costs about ₤120, Progressive Springs would come in at a bit more.

You are looking at the same costs to re-spring the rear shock, but changing the damping oil isn’t economical and the shock might struggle to cope so you could consider a new shock too. Prices start at about ₤290 for a WP, rising to ₤460 for an all singing and dancing Ohlins.

Do you have a Yamaha Thundercat? MCN Compare could save you money on your motorcycle insurance

Bauer Media

Bauer Media Group consists of: Bauer Consumer Media Ltd, Company number: 01176085, Bauer Radio Ltd, Company Number: 1394141
Registered Office: Media House, Peterborough Business Park, Lynch Wood, Peterborough, PE2 6EA H Bauer Publishing,
Company Number: LP003328 Registered Office: Academic House, 24-28 Oval Road, London, NW1 7DT.
All registered in England and Wales. VAT no 918 5617 01
Bauer Consumer Media Ltd are authorised and regulated by the FCA(Ref No. 710067)