"Other" rear spring/shock options?

1878 Views 5 Replies 4 Participants Last post by Nottaracer, Oct 24, 2006

Nottaracer

Discussion Starter · Oct 20, 2006

OK, I'm upgrading the forks of my '01 Monster 750 to those off of a 748 Superbike and I would like to upgrade the rear suspension as well. I don't, however, wish to spend $750 to do so. I know that spring/shock assemblies from the 851/888 will fit, but I've had some trouble finding good used units. So I was thinking "What about a unit from a Japanese bike?" Has anyone tried to fit a spring/shock from a Japanese bike? Any ideas of other non-Ducati assemblies that might work?

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ducvet

· #2 · Oct 22, 2006

just spring your stock shock for your weight. it will cost around $100 and be money well spent.

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Nottaracer

Discussion Starter · #3 · Oct 22, 2006

ducvet said:
just spring your stock shock for your weight. it will cost around $100 and be money well spent.

I was thinking about that, but I don't want to overspring the damper.

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ducpainter

· #4 · Oct 22, 2006

Nottaracer said:
I was thinking about that, but I don't want to overspring the damper.

The damping will be closer than what you'd get from a shock designed for a bike without a linkage rocker, or with a different linkage ratio.

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mr. monduc

· #5 · Oct 23, 2006

I am about to complete my front fork conversion and replaced the rear spring with a Hyperpro progressive spring few weeks ago. I figure you have an unadjustable Sachs rear shock which is not worth (or even will not accept) a new valve. Your options are replacing the rear shock with an Ohlins/Penske (or a cheaper alternative is ***********. Search ebay. here's an older link: http://cgi.ebay.co.uk/ws/eBayISAPI....00000921246&rd=1&sspagename=STRK:MEWA:IT&rd=1 ), or using an aftermarket progressive rear spring which'll work fine with the existing Sachs valve. As far as I understand if you replace the spring with a linear rated one and keep the existing valve on, you'll make things worse since the stock valve will not be capable to dampen the stiffer spring accurately and cause a pogo effect. I have achieved a big improvement when I installed my Hyperpro progressive spring.

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Nottaracer

Discussion Starter · #6 · Oct 24, 2006

mr. monduc said:
I am about to complete my front fork conversion and replaced the rear spring with a Hyperpro progressive spring few weeks ago. I figure you have an unadjustable Sachs rear shock which is not worth (or even will not accept) a new valve. Your options are replacing the rear shock with an Ohlins/Penske (or a cheaper alternative is ***********. Search ebay. here's an older link: http://cgi.ebay.co.uk/ws/eBayISAPI....00000921246&rd=1&sspagename=STRK:MEWA:IT&rd=1 ), or using an aftermarket progressive rear spring which'll work fine with the existing Sachs valve. As far as I understand if you replace the spring with a linear rated one and keep the existing valve on, you'll make things worse since the stock valve will not be capable to dampen the stiffer spring accurately and cause a pogo effect. I have achieved a big improvement when I installed my Hyperpro progressive spring.

Nail on the head! The craptastic Showa shock and my uh,hmmm weight don't seem to work too well together. It's not horrible, but it's not exactly confidence inspiring either. I'll continue to keep an eye out for the Whit Power shock/spring, but no luck so far. I may just end up going the same route as you, or I'll suck it up and spend the cash on a high dollar unit.

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