I saw this on e-bay and was wondering if anyone knew if/how this part could be a performance upgrade for a 700; or maybe this guy is as clueless as most other sellers on e-bay...
I know this guy, he used to race VF's in the 80's at Daytona. I almost bought a bike from him, if you want you can call him at his shop he's a real cool guy.
My guess would be that, as a cam originally designed to pass a 750-size intake charge, that it would pass a lot more than the OEM cam for the 700. The chamber will still be 700cc (or whatever it actually is), but you're easily shoving the oversize charge in there. The more intake charge (air/gas mixture) you can shove into the chamber, the more power you make (to a point). This is why so many people port their heads.
It's basically like buying an aftermarket higher-lift cam for the 700, I would think.
Of course, all this is relative to the concept that the cam on the 750 actually IS higher lift and/or longer duration than the 700, which I don't know it is.
WarriorRacer#13, Feb 21 2006, 01:11 PMMy guess would be that, as a cam originally designed to pass a 750-size intake charge, that it would pass a lot more than the OEM cam for the 700. The chamber will still be 700cc (or whatever it actually is), but you're easily shoving the oversize charge in there. The more intake charge (air/gas mixture) you can shove into the chamber, the more power you make (to a point). This is why so many people port their heads.
It's basically like buying an aftermarket higher-lift cam for the 700, I would think.
Of course, all this is relative to the concept that the cam on the 750 actually IS higher lift and/or longer duration than the 700, which I don't know it is.
Good point. That's pretty much what I was thinking but does anyone have any direct knowledge of this type of "upgrade"????
Yeah I have no idea who's making them but it looks like they have a few different models for different bikes, all carry the designation PS 420 ... whatever that means. They look really nice, and the description makes them sound good, and the price makes me assume they must be great, but for that much money you can't count on assuming things like that.
WarriorRacer#13, Feb 21 2006, 01:11 PMMy guess would be that, as a cam originally designed to pass a 750-size intake charge, that it would pass a lot more than the OEM cam for the 700. The chamber will still be 700cc (or whatever it actually is), but you're easily shoving the oversize charge in there. The more intake charge (air/gas mixture) you can shove into the chamber, the more power you make (to a point). This is why so many people port their heads.
It's basically like buying an aftermarket higher-lift cam for the 700, I would think.
Of course, all this is relative to the concept that the cam on the 750 actually IS higher lift and/or longer duration than the 700, which I don't know it is.
Salty42, Feb 21 2006, 01:13 PMGood point. That's pretty much what I was thinking but does anyone have any direct knowledge of this type of "upgrade"????
Salty42, Feb 21 2006, 07:30 PMSo are they comparable to the Ohlins [or] better than the STOCK???
Progressive Suspension makes a 'lower end' aftermarket product. That is, it will not have the same features an Ohlins unit has. Suspension suppliers like Ohlins also put a lot of time and money into R&D and participate in racing at the highest levels, and what they learn there eventually finds its way into it products. Progressive just makes a replacement shock. I'd say it's equivalent to having your OEM shock rebuilt by Lindemann Engineering. The materials used in your OEM shock may be superior to what you will find in an aftermarket product, although you will still be bound by the limitations of adjustability it has.
Try not to forget that the biggest limitation of OEM suspension is that it has been built NOT to be serviced, despite the fact the shock oil and nitrogen charge need to be replaced/replenished over time, negatively affecting the performance of the unit in the meantime.
Having your OEM shock rebuilt by LE allows you to service it in the future, and most if not all aftermarket shocks are designed to be rebuildable. Even your big $$$ Ohlins shock will not work the way it is intended if you never change the fork oil, and techs at designated Ohlins service centres have told me they have seen rear shocks with almost no nitrogen charge in them at all.
Personally, I think that with Ohlins some of what you are buying is the name. Currently my favorite rear aftermarket shock is the WP Fusion - more expensive than the PS, less expensive than Penske/Ohlins/HyperPro but with all the bells and whistles.
Salty42, Feb 21 2006, 11:21 AMI saw this on e-bay and was wondering if anyone knew if/how this part could be a performance upgrade for a 700; or maybe this guy is as clueless as most other sellers on e-bay...
That was my biggest question. I figured I'd have to get all of the cams in order for it to work properly. I had visions of improperly rotating engine parts breaking each other in my head. The question still remains, has anyone ever DONE this type of 'upgrade'????
End of thread · 17 posts recoveredWayback Machine snapshot 29 May 2006