YZF camshafts

[loganlexow]

Hey all, I think this may be my first post. I've used the search function but can't find any more info on what all is involved in installing these cams into my 400. Can anyone offer advice? Are they drop in? Will I need to install the 400 sprockets or can I leave the yzf sprockets on? Or will I need adjustable sprockets to dial the cams in? Thanks for the help!

Logan
1990 FZR400 with yzf600 swingarm/wheel, GSXR750 shock, GSXR750W forks

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[loganlexow]

Nothing? Well, one of the members of the yahoo group told me that the camshafts need to be degreed in with adjustable sprockets and then some material removed from the lobes otherwise they will hit the bucket seats. FYI

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[yamaha_george]

Nothing? Well, one of the members of the yahoo group told me that the camshafts need to be degreed in with adjustable sprockets and then some material removed from the lobes otherwise they will hit the bucket seats. FYI

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Hi,
have a chat with PAGS or RMQ333 on that group they will know the specifics of what needs to be done OR at least know the guys who have done this properly

[reelrazor]

Which YZF??

Because both Megacycle and Webcam list the exact same profile as stock for the FZR400, FZR600, and the '94-'99 YZF600.


Do you have info to the contrary?

[dru86]

Megacycle and webcam list the aftermarket cams for all 3 models as the same, some of the other manufactures list different cams for the different models. The standard fzr600 and yzf600 cams are the same lift and duration, the 1wg fzr400 cams however are not the same as they have less lift and i think a shorter duration.

When i put fzr600 cams in one of my 400s the timing marks aligned like the stock 400 cams. You will only need adjustable cam sprockets if you want to advance/retard the cam timing or get it spot on as from the factory the timing is not 100% and can be slightly off. You can easily check this by test fitting the cams anyway.

Whether material needs to be removed you'll need to check this on your head. I didn't have any issue with mine, however I've read that some have. You don't want to remove material from the lobe it defeats the whole point of having the 600 cams. What the normal problem is is that the lobe contacts the area of the head where the bucket goes into and material from the head must be removed to clear.