Cam swap with standard jetting

[21QUEST]

Hoping to get some help with regards to a 'cam' swap. Have an idea how the cams increase hp figures etc but trying to findout if what I've got in mind would work .


My question is

Will it be possible to run the JHS stage two cams/doing the K3 cams without any jetting changes ie Standard air filter , standard downpipes with a race can and standard jettings OR will the jetting need to be changed regardless of the fact that the air filter etc will be standard.

Any

Below are the specs of the cams if that helps

http://forums.sv650.org/viewtopic.ph...light=camshaft

JHS Stage 2 - Lift In 0.346 Ex 0.319 (JHS site)


Please no 'why, what's the point' as answer to that has something to do with the words 'cunning , tail and weasel'

Many thanks in advance.

Cheers
Ben

Having put K3 cams in a couple of K1 engines (admittedly on race bikes with jetting and filter already set up to match the full system) there was no need to change anything after fitting the cams.

[northwind]

I found that it made my already rather rough-and-ready jetting a little worse, but that's more likely a case of exacerbating the problems rather than causing new ones.

[21QUEST]

Originally Posted by Mike1234

Having put K3 cams in a couple of K1 engines (admittedly on race bikes with jetting and filter already set up to match the full system) there was no need to change anything after fitting the cams.

.

Thanks Mike. I was almost doing the jig till I got to the race bike bits

Originally Posted by northwind

I found that it made my already rather rough-and-ready jetting a little worse, but that's more likely a case of exacerbating the problems rather than causing new ones.

How much worse world you say it made your jetting. ie what chnges did you then make.

Just trying to cut down mucking around time as I have got very little time at the moment and the bike is in use all weekdays.


Cheers
Ben

[northwind]

It had a wee bit of the "Your mains are too small" hesitation when opening it up from 5000, which was just barely noticable. After the cam swap it became just barely annoying, so I went up a size in jets. Everything se stayed the same. But I wouldn't worry about it, I'm sure it would have been fine if I hadn't been monkeying about with the different exhausts etc all winter.