PDA

View Full Version : cam position - setting timing - help


monkeydude36020
10-22-2009, 11:55 AM
After the timing is set there is obviously 2 ways the cam can be mounted on the gear. With the lobes either pointed down or up. I thought they were suposed to be down and I asked about it in my project thread and someone else told me the same thing. Well I stopped by the honda shop while I was in town and the mechanic wasnt there so I talked to a sales guy. He told me that the lobes are suposed to be pointed up, not down. Im not sure about this now. I dont feel like starting it and busting my valves or breaking my new piston so how is it suposed to be?
Pipeless416
10-22-2009, 11:59 AM
down
monkeydude36020
10-22-2009, 12:03 PM
Originally posted by Pipeless416
down

does anyone second that?
Pipeless416
10-22-2009, 12:08 PM
Originally posted by monkeydude36020
does anyone second that?

lol.. ive had my engine apart a few times.. and my brothers ;)
dalejiw25
10-22-2009, 12:17 PM
I second, Definitely "Down" With the piston @TDC
TRXRacer1
10-22-2009, 12:17 PM
Either way will work, doesn't matter but down will make your life easier.
monkeydude36020
10-22-2009, 12:21 PM
Ok well Im going to take you guys words for it and leave it down. Seems like when you ask a reputable shpo a question like that they should be able to give you a strait answer.
bigbad400
10-22-2009, 12:23 PM
it is definatly down. i have replaced the cam in mine twice and rebuilt the whole thing from the ground up. the lobes go in facing down. the sales guy is not the guy to ask. the mechanic will tell you they go down, as will anyone that knows the ex motor.
Whit11b
10-22-2009, 12:27 PM
Originally posted by TRXRacer1
Either way will work, doesn't matter but down will make your life easier.
HAHA, nice.

Well at TDC they should be pointing whichever way has the valves closed. But better ask and be safe than sorry. You'll have to post a video of it when you get it back together and fired up.
monkeydude36020
10-22-2009, 12:29 PM
Originally posted by Whit11b
HAHA, nice.

Well at TDC they should be pointing whichever way has the valves closed. But better ask and be safe than sorry. You'll have to post a video of it when you get it back together and fired up.

Definitely, I will post wheelie vids, and probably a few burnout vids before I yank these old tires off.
b.lee
10-22-2009, 12:36 PM
You said it yourself, you talked to a sales guy

Sales guys = don't know anything, but they talk like they do.
TRXRacer1
10-22-2009, 12:38 PM
First upgrade should have been a repair manual. Where did you get all your torque specs?
monkeydude36020
10-22-2009, 12:43 PM
Originally posted by TRXRacer1
First upgrade should have been a repair manual. Where did you get all your torque specs?

honda shop, think they gave me the right ones? lol
bigbad400
10-22-2009, 12:46 PM
i sure hope so. but prolly not if you talked to the sales man.... what specs do you have for the head studs and like?
TRXRacer1
10-22-2009, 12:48 PM
Originally posted by bigbad400
i sure hope so. but prolly not if you talked to the sales man.... what specs do you have for the head studs and like? Curious too because if you over torqued the studs you're in short term trouble.
monkeydude36020
10-23-2009, 12:07 AM
Originally posted by TRXRacer1
Curious too because if you over torqued the studs you're in short term trouble.

I have em wrote down somewhere it the garage at home and Im at the gfs house so im not sure, I dont remember. But either way Im going to double check it and make sure they are right, I still have time to take off the valve cover and re torqe the nuts if I have to.
F-16Guy
10-23-2009, 06:58 AM
http://www.atvriders.com/articles/torque400ex.html