VintageVmax.com

I know this thread is kind of old, but I thought I'd ask my question here anyway, since this is on-topic of what I'm asking.. :) I have a complete 1983 Yammi 540 "G" VMax engine that I'm freshening up to install into a 2007 Yamabuggy GTX400, since the O.E. 4-stroke, one-lunger is pretty en...

i just use 2 stroke oil of good quality and keep it topped up regularly, there was antifreeze in the case when i took it apart from the leaking water pump seal. it was milky brown colour. Ohhh, so that's why the water pump seal is such a big issue- oil contamination! Now I'm beginning to understand...

tyler440 wrote:i dont know why but i either missed the oil pump icture before your it didnt load....

yes that is a "red dot" on the oil pump... it has been updated your good to go on that

Yeah, the pics load wierd for me too sometimes.. Oh well.

I'm glad on the oil pmp thing.


PJ

Since the engine is out of the sled a consideration about reliability would be the gearcase assembly, Mine had 7000 miles on it and my case needed work all new bearings and seals were replaced. There was alot of wear believe me!!! If you look in the MY PROJECT section look for 1985 vmax and look at...

I figured out the image upload thing. Here ya go.








pj

Thanks for the "red dot" info...I didn't know that! I snapped a couple of pictures of my project engine and by the looks of things, it may have the updated "red dot" oil pump on it afterall, albiet the dot is a bit smudged. What do you think? Also, please take a look at the engin...

Thanks Tyler for the info, as that's what I was looking for. :) I bought a set of pipes online from a 1985 VMax, so I should be covered there and I read the info posted on this site about the water pump seal stuff. I'll use the part numbers provided in that tech thread to hopefully fix that issue on...

Thanks for the reply and for the correction on the engine model I have. I must have mis-understood the literature I found and read online. 1983 Vmax 540 it is.. :) I do plan the pull the engine down for a freshen up and I wanted to apply any modifications or upgrades to it that would increase its pe...

14 views and no one knows anything about this engine???

PJ

Hi guys.. I just found this website, so I joined up and this is my first post. Pretty cool and informative website for sure, so I'm learning more and more about these sleds/engines everyday. Looks like there are a bunch of very sharp people on here! 8) I'm currently building a 1980 Yamaha SS440 proj...