Surfriding tbm flywheel doesnt fit keyway or crank taper?

[OCD Solutions]

Duh, 79 ft/lbs ! Please, advise what manual might that be?

Sorry I meant 75ft/lbs. Clearly stated on the TBM instruction sheet that came with the fw's.

 

[THRUST]

i dont believe ryan has a 61x stator , he said it was off a 97 sj so unless it was switched by maybe previous owner but i doubt it . i believe it was machined to much which allowed it to go on further than supposed to possibly

 

[RyanITV]

i dont believe ryan has a 61x stator , he said it was off a 97 sj so unless it was switched by maybe previous owner but i doubt it . i believe it was machined to much which allowed it to go on further than supposed to possibly

It's a 61X (so says my receipt from JSS and the marks on the unit) - must have been switched by one of the prior owners. I'm pretty sure when I bought the ski from Pancake he hadn't been into the motor.

 

[masterblaster]

Ryan,that explains the wear on the hub where it was hitting the stator,was there any wear you could see on the back the hub itself,cant really see in the pic. can you push the key through it with a tool now?

 

[steve-uk]

heres what happened with mine

http://www.x-h2o.com/threads/...-rub&highlight=


i removed the flywheel and made sure there were not obstructions etc, i think the flywheel gasket got kinked and rubbed on the flywheel as it just took off the anodising

the only thing was, when i firt started the motor i was having serios staring issues, it sounded like my bendix was spinning

after addressing this "rubbing" issue the cranking issues also disappeared​

 

[waxhead]

I've had two TBM flywheels. First felt tight like that and cracked within a couple hours. They refused to warranty it too. They claimed no one else had ever had a problem. That's obvious BS at this point. It also trashed my 8mm stroker crank snout. Dumbass me spent another $500 on another one that also failed within hours. Stock and MSD work fine and TBM can suck me.

Thats about the 4th one I have heard of cracking now

 

[DK-Freestyle]

That's strange, we've done over a dozen builds with TBM flywheels and they all fit perfect. Tim makes them so the key way is a snug fit on the flywheel. We've never had any problems with them, hopefully its just a couple defective ones..

 

[masterblaster]

Sorry I meant 75ft/lbs. Clearly stated on the TBM instruction sheet that came with the fw's.

Are you sure your directions say 75 lbs?They have changed that to 65lbs now in the directions on mine prolly because they have been cracking moire than the 4 we know about,not everyone is on the forums,and the internal hub is not machined the same way either,not sure why they changed that,possibly related .he is suppose to call me back today,we will see I guess

 

[rkm]

That's strange, we've done over a dozen builds with TBM flywheels and they all fit perfect. Tim makes them so the key way is a snug fit on the flywheel. We've never had any problems with them, hopefully its just a couple defective ones..

A snug fit on the key way? Thats just asking for it to crack out

 

[OCD Solutions]

I double checked my sheet before i posted. It says 75 ft/lbs but i know that there is a vast difference in opinion of what it should be torqued to.

I can post up a copy if anyone needs it to help with a warranty claim from over torquing.

 

[QuickMick]

Did any of you guys, even you aaron.. Get some machinest bluing or a black felt tip marker and paint the snout of the crank, hand install the flywheel, do a quick rotate, remove flywheel and check for contact indications on both snout and taper area of crank?

This was a must on the ole GP1200R cranks to check for fit. Scratches and rub areas in the marked areas should be even all the way across the taper.

good luck.

 

[masterblaster]

Talked with Tim,He says that they shouldnt feel to tight but snug,he was going to have me send mine back and replace it,till I told him I had already put it on and tightened it and removed it cause it felt diffrent going on that most.. He said torque it to 65 and run it as is. he also said they have over 1000 out there sold in the last 5 yrs for yamaha 701s with less than 1% warranty's. I didnt think they had been out that long for the 701.
Aron...he said that he has never gotten a yami 701 tbm fw back for a warranty that was denied,much less 2.Im just telling you what he said,so you might want to post up what you experience was more specifically.

He also said that tbms dont work well with advent igns,he said the ski will start and run but always acts like it has a rich condition?????I forgot to ask if they actually checked timing with a light or not. he says the issue is because the advent ign works off a trigger like kawi stuff and the yami works off magnet position and strength or something in the stock flywheel. He said he didnt even know of the epic ignition at all. He couldnt tell me why the one ryan has looks diff on the inside than mine with the square blocks even though he said he machined them all himself? He says they lowered the torque spec from 75 to 65 because guys were over torqueing them,seems to make sense to just put in the directions DO NOT torque past 75 lbs? take from it what you will,thats what was said

 

[RyanITV]

The square "blocks" in my photo were just metal shavings - I guess they stuck there - they wipe right off.

I shipped mine back to Brian today; he wants to take a look at it. Left the key jammed in there.

Ryan

 

[Watty]

He said he didnt even know of the epic ignition at all.

I hear alarm bells ringing...He knows all about the Epic, he just doesn't want to KNOW about it.

Something is fishy with the TBM's...Nearly every flywheel I have seen has had some sort of problem with it. At the very minimum, the flywheel has somehow destroyed the bendix and then eaten bits of it. I've probably seen that one alone about 4 times. I've never seen a TBM flywheel that has been used for a considerable amount of time and come out looking like it did from the box.

I personally think they are way overpriced and offer minimal power gains. Get yourself a #zero lightened flywheel, run it with the Epic and be happy.

 

[Matt_E]

X2

 

[masterblaster]

watty,didnt you do a review of the tbm and the epic a while back and say they worked great together? If you are seeing so many look eatin up id have to guess its the ring gear,its twice as thin as the stocker,or other aftermarket rads,msds and jetinetics,Im not sure what its made from either,it might be a softer lighter metal
Ryan those are some really symmetrical metal shavings right there bud,must be the magnets underneith doing that.

 

[RyanITV]

Ryan those are some really symmetrical metal shavings right there bud,must be the magnets underneith doing that.

Yeah - that's gotta be what it was. Here's a shot of the stator I just grabbed after pulling it:



Ryan

 

[ATS_Aaron]

Aron...he said that he has never gotten a yami 701 tbm fw back for a warranty that was denied,much less 2.Im just telling you what he said,so you might want to post up what you experience was more specifically.

He also said that tbms dont work well with advent igns,

I had just about let this go, but reading this thread recently really ticked me off.

First, EVERYONE knows the second version of the TBM Yama flywheel was sold as 100% compatible with the Advent ignition. Now they are claiming it is not compatible with the Advent? I called and spoke to TBM before buying one and was told this by TBM themselves (I think it was a guy named Demario or something). That is why I paid full pop retail to TBM for one, because at the time the distributors (I am a Hot Products dealer) only had the first version in stock.

My first TBM broke within only a few hours of run time. I think it was less than 2 tank of gas before it broke. However there was quite a bit of downtime on my ski because of issues with my engine. The hub cracked and the key fell over and trashed the snout of my crank. Crankworks was backed up like 8 weeks at the time. So to avoid losing a summer of riding I bought a new 8mm stroker crank from Team Scream ($1400). I sent the piece of crap...oops I mean flywheel it back to TBM. They claimed they had never seen one crack before, blah, blah, blah. They "graciously" offered to sell me one at dealer cost (PS that's not distributor cost, it's one unit at a time dealer cost, still like $400+)

The second TBM lasted maybe 2 tanks. The starter drive broke and lost a small piece that was sucked into the magnets on the TBM. It wedged between the stator and flywheel and ground it down until it no longer worked. What caused the starter drive to break was the incompatibility with the Advent ignition. The timing would randomly jump around during starting and sometimes the engine would kick back. What really makes me angry is that I bought this crap on TBM's word that it WAS compatible...and now they claim it isn't? So if Tim isn't lying then why did they bother making the second version of the flywheel?

I still have the second one. I called TBM and they told me not to even bother sending it in to see if it could be fixed, repaired or replaced under warranty. I cut my losses and threw that ^%$#@ in a closet and switched to a MSD Pro-Digital Total Loss.

I'm so angry about these jerks claiming they never turned down a warranty claim that I can barely type so I hope my spelling and punctuation isn't too bad.

Aaron

 

[ATS_Aaron]

I do recall the first TBM was really tight on the crankshaft key because I had to use a puller to remove it the ENTIRE WAY. on a normal flywheel you just need the puller to initially POP the flywheel loose.

Aaron

 

[masterblaster]

Aron,yea that is true,the keyway being to tight makes you have to pull it the entire length with the puller cause its stuck in the FW. Something is deff really fishy,I called Advent, and he said he had a tbm fw that they sent him to try and test for compatibility,but he currently hadnt tested it,and was going to try to get to it in the next couple days then I told him all the issues another bud of mine running a tbm and advent was having,he then said he just checked his setup and that he wasnt going to be able to test it cause some issue with the holder for a 62t stator and that I should run it with only a stock 62t fw??????he goes on to say that it wouldnt matter cause the advent will make like 15 hp more and easy overcome the extra weight of the stock fw.......ummm why do all other tl systems come with a super light fw under 2 lbs then?

There is something different about the pickup on a advent ign like similiar to a kawi is what Tim from tbm says,Greg at advent says thats not accurate,and that a tbm fw doesnt have the same magnet strength as a stocker and that it fires off magnet position only?? Who knows why tim made the second ver,maybe a attempt to make it work but didnt really work out,at any rate they are now saying it is not compatible..Sorry to be the messenger of bad news Aron,im guessing they were not really sure at the time if it worked or not because enough testing was not done,the motors did run just not well from what I gathered.My bud Mike has this setup and it does run.......just not well. This leaves the next question,how well do they really work with the epic and what kinda pickup does the epic use?