yzf918
Posts: 11 Joined: 4/01/2008 Location:
|
10/29/2009 5:45 PM Has anyone used the pro circuit cams in there bikes? im thinking of putting them in an 09 kx250f and was wondering if i need to use the pro circuit springs to or if i can put in the cams with stock kawi components?
thanks for the help |
Justin314
Posts: 152 Joined: 2/17/2009 Location:
|
10/29/2009 7:34 PM Edited Date/Time:
10/29/2009 7:48 PM With Yamahas, stiffer valve springs were needed since the PC cams are more aggressive than say, Hot Cams. The Kawis may be the same. Hopefully someone can verify for you.
|
david
Posts: 8 Joined: 4/01/2008 Location:
|
10/29/2009 9:44 PM I would use the PC valve springs also. It will help reduce the chances of valve float. Stock valve spring are rated for stock lift and rpm. PC valve springs and retainers are rated for their cam lifts and rpm
|
williamsmotowerx
Posts: 932 Joined: 4/01/2008 Location:
|
10/29/2009 9:48 PM I have a dyno test somewhere of the PC cams on the 09KXF250, they make less power than the stock ones. I'm not trying to bash them, but just telling it like it is. The Hotcams, same thing.
They all worked good on the '04-'08 heads... but the '09 head is totally diferent. Takes a very specail cam to work in that head. |
yzf918
Posts: 11 Joined: 4/01/2008 Location:
|
10/30/2009 3:38 AM thanks everyone i appreciate it. Williams any suggestions on cams?
|
lumpy790
Posts: 942 Joined: 9/18/2007 Location:
|
10/30/2009 5:06 AM make sure you degree the cams and then spot weld the sprocket on.....a few years ago I watched the PC KXF250 cams spin the sprocket on the dyno.....was driving the motor builder nuts...every run put up less HP.
|
motofab36
Posts: 400 Joined: 4/01/2008 Location:
|
10/30/2009 6:30 AM 
I have a dyno test somewhere of the PC cams on the 09KXF250, they make less power than the stock ones. I'm not trying to bash them, but just telling it like it is. The Hotcams, same thing.
I had a hunch this was the case, we had stage 2 hot cams in our 08 kx250f with two bros exhaust and thought it ran pretty good till we got the 09, the 09 bone stock with a little jetting adjustments will run circles around the 08. The 09 is a very good engine IMO.
|
williamsmotowerx
Posts: 932 Joined: 4/01/2008 Location:
|
10/30/2009 11:29 AM
thanks everyone i appreciate it. Williams any suggestions on cams?
I sent you an email from this site.
If you didn't get it, send me one to jesse@williamsmotowerx.net |
mxr102
Posts: 132 Joined: 5/18/2009 Location:
|
10/30/2009 11:43 AM I have used Crower Cams in everything I owned. They are I feel one of the greastest cams on the market. I agree with what everybody has said about the Hot Cams.
  |
WARTH #344
Posts: 16 Joined: 6/27/2008 Location:
|
10/30/2009 11:59 AM
Has anyone used the pro circuit cams in there bikes? im thinking of putting them in an 09 kx250f and was wondering if i need to use the pro circuit springs to or if i can put in the cams with stock kawi components?
You can put the stage two hotcams in with stock everything. I have been running them for a year and love the power and I haven't had to adjust anything. I have a 2007 RMZ 250. I also put a vertex high compression piston in it, it runs like a champ now.
|
williamsmotowerx
Posts: 932 Joined: 4/01/2008 Location:
|
10/30/2009 3:35 PM Some of you guys have to remember that just because it felt good in your make/model doesn't mean that cam manufactuer will work with another make/model.
Buy from a engine builder that has a specific package, it will cost a bit more but you will be getting something that has been tested thoroughly.... you hope. Make sure your engine builder has data to back claims up. Most of the time when you just throw random things at these motors you can lose power... but it may feel good in a certain area. that's because it's slower everywhere else... so the sweet spot just feels good. |
mxr102
Posts: 132 Joined: 5/18/2009 Location:
|
10/30/2009 6:23 PM I agree with you a 100% Jessie. My engine builder has tons of flow bench and Dyno time with every motor I have ever had done 2 stroke or 4 stroke. My last 450 Honda with stock bore and stroke pumped out a little over 60hp. HC piston, Crower Cam, Vortex Ignition, 2mm Bigger Valves,VP U4.2, Ported Polished and Flowed head, Full Yosh System, and Carb Work. The Power was really strong and smooth, it was nothing that would rip your arms off.
|
WSR
Posts: 1193 Joined: 8/15/2006 Location:
|
10/31/2009 4:29 AM
Some of you guys have to remember that just because it felt good in your make/model doesn't mean that cam manufactuer will work with another make/model.
Best advice I've heard in a while.
You lose 100% of the chances that you never take! |
R-acer
Posts: 2418 Joined: 3/20/2008 Location:
|
11/3/2009 9:07 AM Edited Date/Time:
11/3/2009 9:08 AM Interesting.... I spoke with an "expert" rider on the weekend who owns a 2009 KX250F and a 2009 KX450f. He loves both bikes and ride each in different conditions and tracks etc....
He was telling me, for his 09 KX250F, he had the head ported, PC cams and PC vavles with springs installed and he said the bike was a whole different animal and said it was quite a bit faster. I was asking him because I was going to do the exact same thing for my sons 09 KX250F..... he was raving about it. I dont know........... The dude is CRAZY fast on both his bikes, so its hard to not take him serious... Wish there was some dyno charts to look at  |
R-acer
Posts: 2418 Joined: 3/20/2008 Location:
|
11/3/2009 4:48 PM
I have a dyno test somewhere of the PC cams on the 09KXF250, they make less power than the stock ones. I'm not trying to bash them, but just telling it like it is. The Hotcams, same thing.
I emailed PC a couple weeks ago about the different cam profiles for the 09 KX250 because a seller had them listed for 07-2010 bikes, and since I know the 09/10 are much different than the 08 I asked PC. They said the 09/10 is a completley different cam made for this engine only and for me NOT to use the older version.
I am curious if you used the 09 specific cams, or the older model cams in the 09 engine? |
Kawirider
Posts: 177 Joined: 10/28/2008 Location:
|
11/3/2009 8:12 PM On PC website it says 04-09, I got stage 2 hotcams for my 09 kawi 250f and they were no good put stock back in, Im wanting to get a good motor set-up for my 250F
|
R-acer
Posts: 2418 Joined: 3/20/2008 Location:
|
11/4/2009 3:53 AM
On PC website it says 04-09, I got stage 2 hotcams for my 09 kawi 250f and they were no good put stock back in, Im wanting to get a good motor set-up for my 250F The PC Engine builder that I spoke with says that is a mistake on the PC web site.
He said i need a specific "09 cam" and that is the only cam that should be used in the 09 engine. |
yzf918
Posts: 11 Joined: 4/01/2008 Location:
|
11/4/2009 5:47 AM thats strange everywhere i have looked they say from 04-09 i havent seen a cam designated strictly for the 09 yet.
|
R-acer
Posts: 2418 Joined: 3/20/2008 Location:
|
11/4/2009 5:51 AM Edited Date/Time:
11/4/2009 5:53 AM
thats strange everywhere i have looked they say from 04-09 i havent seen a cam designated strictly for the 09 yet. Here is my last cam question email..reply from PC.
"That listing must be a mistake on the website. The 2009 cams only fit on that year. Thanks. Ryan Oeftering" |
motofab36
Posts: 400 Joined: 4/01/2008 Location:
|
11/4/2009 6:03 AM The kawi part numbers are the same for the 08 and 09 49118-0065 49118-0066
|
R-acer
Posts: 2418 Joined: 3/20/2008 Location:
|
11/4/2009 8:51 AM
The kawi part numbers are the same for the 08 and 09 49118-0065 49118-0066 I am only going by what Pro Circuit is telling me directly..........
|
yzf918 wrote: Has anyone used the pro circuit cams in there bikes? im thinking of putting them in an 09 kx250f and was wondering if i need to use the pro circuit springs to or if i can put in the cams with stock kawi components?
thanks for the help