Ducati Monster Forum

Howdy!

I found a handy modification that fixes the lightswitch-like on/off abruptness of low throttle openings on my 2000 Cagiva Gran Canyon (Ducati 900ie fuel injected motor). Since this was an issue on the '98 ST2 I used to own and on a lot of fuel injected Ducatis of the era, I wanted to share some photos of the mod.

PROBLEM: Riding the Cagiva off-pavement was pretty difficult, as bouncing around a bit at small throttle openings had me lurching from hard acceleration to engine braking with every little bump, which is hardly a comfy feeling for someone like me who's got limited dirt experience. I had the same issue with the ST2 in low-speed traffic and the couple of times I took it out on gravel & dirt.

SOLUTIONS: The G2 Throttle Tamer looks like an excellent product, which uses a modified cam at the throttle tube (right grip) to slow the amount of cable it pulls at small openings. I was just about to buy one, when I read about a modification to the other end of the system, the cam at the throttle body. That one's free & reversible, so I figured at worst I'd be out an hour of my time if it didn't work.

Here's the video I worked from:

https://www.youtube.com/watch?v=1OWmScW6HEQ

And here's my job in progress:

Unmodified cam, taken off the throttle body with a 12mm wrench -

(https://live.staticflickr.com/65535/51179115436_3f48ba4ffd_c.jpg) (https://flic.kr/p/2kYwkY1)20210513_104940 (https://flic.kr/p/2kYwkY1) by triangleforge (https://www.flickr.com/photos/7138702@N03/), on Flickr

I marked where I wanted the new pivot hole to be with a scratch awl, used a punch to start two 3/16" holes inside that space. I then used small files from this set to open up the second pivot hole to approximately 5mm x 8mm, checking with a set of calipers to make sure I wasn't opening it too much.

(https://encrypted-tbn2.gstatic.com/shopping?q=tbn:ANd9GcTEyryCxqONEjHdbAbOTomzibrRx7ukQc0E-s-S_paSlpZQ0O1ygFIVZor7CteHHj7HZq7PD3eALioDMXp2IjMN_bihN8hWC1kQ_Ch1G7tamPMKdXWSJ32U4Q&usqp=CAE)

The finished cam looked like this:

(https://live.staticflickr.com/65535/51179337188_7ff1b216fa_c.jpg) (https://flic.kr/p/2kYxtTj)20210513_121956 (https://flic.kr/p/2kYxtTj) by triangleforge (https://www.flickr.com/photos/7138702@N03/), on Flickr

And here are a couple of shots to show the relative position of the cam as original vs. modified. Of course, I put the nut back on after I was done...

(https://live.staticflickr.com/65535/51179909384_2890210648_c.jpg) (https://flic.kr/p/2kYApYL)20210513_122238 (https://flic.kr/p/2kYApYL) by triangleforge (https://www.flickr.com/photos/7138702@N03/), on Flickr

(https://live.staticflickr.com/65535/51179337173_0c8eaca7d3_c.jpg) (https://flic.kr/p/2kYxtT4)20210513_122216 (https://flic.kr/p/2kYxtT4) by triangleforge (https://www.flickr.com/photos/7138702@N03/), on Flickr

I'm really happy with the result; being able to keep a steady throttle has made a huge difference in the performance of this bike (and rider) off road, especially when standing on the pegs, which used to be pretty sketchy. If you've got a middle-aged, fuel injected Duc that's a handful in city traffic, this mod might be worth a look.

Very cool.  [thumbsup]

 [thumbsup]

You got a wild beast to tame f sure... ;)