Installing a Hot Cam
 

Before doing this job read the workshop manual. As this is a guide line only.


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Installing a Hot Cam
 

http://i201.photobucket.com/albums/a...evxtx/17-1.jpg

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You are now ready to go for a ride, follow the manufactures break in period for the new camshaft.

If you are using a new camshaft, change the engine oil to a mineral oil to run the cam in.

Cheers for all the info kev, nice too see all the piccies too.

No worries, I do quite a few things on my bike behind the scenes & don't document the procedure. So I decided this may help others as there seems to be an interest in fitting these Hot Cams.:bbq[1]:

you are the man, kev. roughly what hp gains do you expect from this mod.?

I have already run this mod on the dyno.

http://www.xt660.com/showthread.php?t=4509

http://www.xt660.com/showpost.php?p=54997&postcount=86

Very good job mate, thanks for all this step by step info.......:icon_cheers::icon_cheers::icon_cheers:

Hello Kev, do u have the Hotcam stg1 service manual in PDF for download ?
thanxs

Hotcams do not supply any service manual with their camshafts. I do have all years 04 to 09 XT660R & XT660X parts & workshop manuals in PDF.

Part 1
http://www.youtube.com/watch?v=Pf7EK-Wsq0k

Part 2
http://www.youtube.com/watch?v=eGqh0ut80RE

Hi Kev,

I'll install stg1 HotCam tomorrow. I've changed the motor oil a month ago. Rode aprox 700km. After the instalation of Hot Cam do i need to change the oil again ?

forgot to say...my hotcam is second hand

hotcam
 

Good afternoon Kev. He has more than one type of hotcam available for XT660? I am thinking of putting one in my 66, I do not know how to buy, if an original piece yamaha, you can enter the code?

Fred what year is a 66 XT660?

There are 3 stages of hot cams that will fit the XT660X/R/Z. They will all fit but you have to use all the decompressioner parts from the Raptor 700 as well otherwise the Hot Cam does not fit in the XT.

I have a complete Raptor 700 cam for sale right now if you are interested.
http://www.xt660.com/showthread.php?t=10069


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Stage 1 Hot Cam
http://cgi.ebay.com/ebaymotors/NEW-Y...Q5fAccessories

http://www.hotcamsinc.com/index.cfm?...ssreleaseid=15

http://www.hotcamsinc.com/index.cfm?...&productid=550

Stage 2 Hot Cam
http://cgi.ebay.com/ebaymotors/NEW-Y...Q5fAccessories

http://www.hotcamsinc.com/index.cfm?...ssreleaseid=16

http://www.hotcamsinc.com/index.cfm?...&productid=551

Stage 3 Hot Cam
http://cgi.ebay.com/ebaymotors/NEW-Y...Q5fAccessories

http://www.hotcamsinc.com/index.cfm?...&productid=624

Any perticular locktite to be used? Thread locker?

I use 609 locktite

I bought OTR cam and about to install it. What valve clearances should i set? Same as factory?

You would have to ask OTR.

I will :icon_burnout[1]:

What are the dimensions of Hotcam?
Aprox. dimensions of OTR cam is inlet 41.1 & 33.9 mm and exhaust 41.8 & 34.8 mm.

You can't measure a cam like that, you need to measure the duration, lift & lobe centers to calculate the difference between the cams.

The OTR cam has proven to produce some good results, you will need a custom fuel map on a dyno to get the A/F ratio right.

Yes I know this is not the way of measuring cam. but compared to original it is about 2-3mm smaller and valve clearance adjusting screw must go out almost all the way. But OTR replayed that valve clearances should be same as factory. Thanks anyway.

No worries. Are you going to run your bike on the dyno? I would be keen to see a before & after result with the OTR cam.

Testing must wait warmer weather. Now here in Serbia is bellow zero. Btw I have Aprilia Pegaso Strada not XT. :occasion14:

Installation of cam is done. Drove almost 50km today and it is completely different bike. Almost the same at low revs but at the higher rev it start to pull like locomotive. Exhaust sound is much louder and the mechanical sound from the engine is more intense. Is it normal to have more noise from the engine? Some sort of clicking sound.

Yes quite normal with a high lift camshaft.

Yes I know it is normal to valve noise is increased but clicking sound what I hearing its not completely in sync with engine. Will check the valve clearances once more... How often do you check your valves?