Yamaha used 144 and 155mm pumps with most of their bolt-in units.
If you engine is a Suzuki 640, it's most likely a 1995 Tigershark Montego. This model was one of the few that did use a bolt-in aluminum duct. And since that pump doesn't look like a Yamaha pump, I'm going to say this is likely what pump it is.
In that case, here's a link just to show the parts:
https://www.alpha-sports.com/arctic_cat_tigershark_parts.htm
I wouldn't try to order anything from here, though, because, since they are unused parts which are near obsolete, they are VERY expensive. That intake duct, for instance, is over 900 dollars!! :shock:
Compare that to the price for a brand new duct of a yamaha xl1200 at about 200 dollars, and you can see why the yamaha is the more economical pump choice for any jet john build, or if you decide to replace that existing pump at some point.
You're better off to look around on the net to find any replacement part you may need for the TS pump. A wear ring and prop, for instance. Maybe the thru-hull bering, if the existing one is leaking. Or possibly the stator if the vanes are eat up from sand or corrosion. Most everything else in a pump doesn't wear out.
Hope this helps.
