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Discussion Starter #1
:wow: here is a vulcan motor i tore down last winter. it is a 2002 model with 12k miles. the p/o said it died with no bad noise (yeah right!). all you new riders, find out what an mcct is and why it replaces the acct (tensioner). and all you guys that talk about acct conversions so much, here are pics and not words. the p/o lost $2000 or more when i bought this from him, all because he ignored the grinding noises. look at the cam teeth, and the valve that was sucked all the way to the bottom of the case. this motor was well beyond reasonable repair, it just would not have been cost effective. this was the front jug. and with only 12k miles, what a shame. the toc mcct's would have cost $100. to repair this professionally would be several thousand dollars. i am going to be putting the toc's on my 88 vn750 soon, it is just beginning to clatter a bit. enjoy, and be happy it ain't YOUR bike!





















(more pics)
 

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Discussion Starter #3
first pic, metal in the head pipe. collapsed acct front jug. lots of metal in manifold. hole and crack in piston, mashed valves into head. sucked a valve deep. the cam teeth kill me, how the [email protected] did you think that motor sounded normal??

anyone heard my stupid squirrel theory???:loser1:
 

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The Reanimater
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Discussion Starter #5
Been There, Done that. Only I rebuilt the engine
that's fantastic you were able to. i am guessing MOST of the casual riders would not attempt to split the cases and rebuild the motor. it's a pretty big job. really i wanted to show some of the new riders what can happen if they ignore noisy cam chains. this bike had ONLY 12K MILES! had the owner even taken it in to a dealer, the repairs would have been a couple hundred. he lost his butt big-time due to blowing it off. the p/o was able to change spark plugs and that is about it. if your bike is making bad noise, park it!! sell it!! take it to the dealer!! don't ride it until it looks like this!!:doh:
 

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...I'll tell ya though, his cam sprocket teeth look better'n the ones in my mouth, lol.
Best advice is to see a certified MCCT dentist !.... ;)
 

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Discussion Starter #7
...I'll tell ya though, his cam sprocket teeth look better'n the ones in my mouth, lol.
Best advice is to see a certified MCCT dentist !.... ;)
hehe nice!

hey man i love the pic of rasputin! if y'all don't know who he is, google him! the man was murdered like 3 times before he would die! fed him poison, stabbed him, and dumped him in a frozen river to kill him! he was definatley a "special" person who could mesmerize people with his eyes... i used to have his pic on my wall and would tell people it was my grandpa... hehe
 

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Just a quick thing on personal experience, I bought the TOC ACCT rebuild kit when I got the bike 2 years ago. Put the front cylinder acct spring on, put it on the bike without the ACCT cap bolt, started the bike and all was great. Super quite. put the cap bolt on and started getting a very light raddle. backed off the bolt, quite. The cap bolt was bottoming out on the acct adjustment bolt and the innerds being left hand thread and the cap bolt being right hand thread was causing it to release tention when tightening the cap bolt and it bottoming out. Wonder if this may be a common problem that caused the acct's to not be able to add tention to the chain because of the cap bolt wedge again the adjustment internals.
 

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Discussion Starter #10
Now, he said it died with no noise??? Did he have hearing aids?
the p/o bought a new battery and spark plugs thinking that was the problem! he actually said "it idles ok but won't rev up"... the new plug electrode was immediately mashed shut... i picked her up for $500 on cl, he was asking $1000 and trying to make like it was a minor problem! yeah i can't even imagine how horrible the noise must have been with the sprocket teeth being ground off, let alone knocking a couple valves thru the piston cap. i have blown a couple motors in my days, yeah you know when it happens what it is! makes a pretty gruesome sound... plus i imagine if it jumped a tooth here and a tooth there it was pretty much running on one cylinder there at the end of its poor life.
 

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Discussion Starter #11
Just a quick thing on personal experience, I bought the TOC ACCT rebuild kit when I got the bike 2 years ago. Put the front cylinder acct spring on, put it on the bike without the ACCT cap bolt, started the bike and all was great. Super quite. put the cap bolt on and started getting a very light raddle. backed off the bolt, quite. The cap bolt was bottoming out on the acct adjustment bolt and the innerds being left hand thread and the cap bolt being right hand thread was causing it to release tention when tightening the cap bolt and it bottoming out. Wonder if this may be a common problem that caused the acct's to not be able to add tention to the chain because of the cap bolt wedge again the adjustment internals.
i don't know, but i know the more that people discuss the acct issues and see pics like this, the more people (especially new riders) will know that something needs done! i have a huge fondness for the vn750 and hate to see someone ruin their motor from just not knowing.
 

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if y'all don't know who he is, google him! the man was murdered like 3 times before he would die! fed him poison, stabbed him, and dumped him in a frozen river to kill him! he was definatley a "special" person who could mesmerize people with his eyes... i used to have his pic on my wall and would tell people it was my grandpa...
Well, I AM 100% Russian, and my grandfather on my dad's side was said to have been a priest "of some sort".... :wow::wow::wow:
 

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Discussion Starter #13
Well, I AM 100% Russian, and my grandfather on my dad's side was said to have been a priest "of some sort".... :wow::wow::wow:
sweet!! wolfie rasputin! cool stuff:smiley_th
 

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I'm one of those clueless people. I have mechanical knowledge, but not in bikes. What I hear sounds like the chain sliding along the tension plate. Is this normal? It's not grinding, rattling, or chattering like I would expect to hear from a loose chain.
 

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Discussion Starter #15
I'm one of those clueless people. I have mechanical knowledge, but not in bikes. What I hear sounds like the chain sliding along the tension plate. Is this normal? It's not grinding, rattling, or chattering like I would expect to hear from a loose chain.
look at the pics. there is a definate design defect. if you even SUSPECT your cam chain is loose, fix it, bro! there are a TON of posts on the acct vs mcct. i would venture to say that if you can hear ANYTHING then spend a hundred bucks on the toc manufacturing mcct, or do your own research and do what you think is best. if it jumps a tooth it could be YOUR motor in the pics. i suppose i could muddle my way through a total vn750 rebuild, if i HAD to, although it would take me a LONG time. i would much rather use that LONG time to go for a LONG ride. if i save one motor with my picture essay, then cheers to me:beerchug:and to the person's motor i saved. i like to see vulcans rolling down the road, and not rolling to the junk heap!
 

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Just a quick thing on personal experience, I bought the TOC ACCT rebuild kit when I got the bike 2 years ago. Put the front cylinder acct spring on, put it on the bike without the ACCT cap bolt, started the bike and all was great. Super quite. put the cap bolt on and started getting a very light raddle. backed off the bolt, quite. The cap bolt was bottoming out on the acct adjustment bolt and the innerds being left hand thread and the cap bolt being right hand thread was causing it to release tention when tightening the cap bolt and it bottoming out. Wonder if this may be a common problem that caused the acct's to not be able to add tention to the chain because of the cap bolt wedge again the adjustment internals.
I have installed the stiffer TOC spring in the front cylinder ACCT and all is quiet, but (after reading your post) I was concerned that there may be an interference problem that you described. I took some measurements using a tire tread depth guage. The ACCT internal adjustment screw head is 10/32" from the top of the housing, the cap screw is 7/32" length so there is 3/32" clearance. Perhaps you have a "replacement" cap screw that was installed by a PO.
 

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sparkingdog - thanks for sharing the photos of your teardown and the good advice: DO NOT IGNORE unusual engine noise. Is it possible that the cam chain tension was TOO tight and therefore relatively quiet so that the PO did not notice until it broke?

skyboxer is concerned about a sliding noise - cam chain too tight???
 

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Discussion Starter #18
sparkingdog - thanks for sharing the photos of your teardown and the good advice: DO NOT IGNORE unusual engine noise. Is it possible that the cam chain tension was TOO tight and therefore relatively quiet so that the PO did not notice until it broke?

skyboxer is concerned about a sliding noise - cam chain too tight???
on this bike the acct (tensioner) was collapsed and putting no tension at all on the cam chain slider.

i can't say about the sliding noise, quite honestly. but no issue, no matter how minor seeming, should be ignored on this motor with the know acct issues. i would say ANY unusual noise should be checked out immediately!

i am not pretending to be a master motor builder, no no. i am not. i have always worked on my own bikes since i was like 8, i do have a lot of experience, mostly i just wanted to show the pics as they are worth a thousand posts using words. pics of a sucked valve really catch attention!
 

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glad i got mine ordered the other day! if i play around with the stock ones, it usually works fine... for a while. not for me, especially after seeing this!!!
 

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Discussion Starter #20
that's good to hear. looks like my pics are opening a few eyes. mission accomplished. not only would it be heart-breaking to have this happen to my own motor, imagine the pain it might be... i often ride solo 150 miles from home in VERY rural areas where my cell phone has no service. it would be one helluva day to suck a valve out in the boonies. let's keep 'em alive, guys and girls!
 
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