Forward engine mountings sheared :(

redlinerpm · Post by **redlinerpm** » Mon Aug 25, 2008 8:54 am

Stripped my latest purchase right down yesterday and removed the frame. I was surprised to find the fwd engine mountings on the cylinder head sheared

both of them

The bike has been down the road but there is no indication of front impact, which would cause this problem.

Is it common on these 400`s or have I just been unlucky?
The net result is a fwd cylinder head or it might be easier to pick up an engine.

Any feedback is appreciated.
cheers

veefer400 · Post by **veefer400** » Mon Aug 25, 2008 9:44 am

Jeez.... thats crap! Never heard of that one....
best to just fit the new head, Which Vee4 is this??

redlinerpm · Post by **redlinerpm** » Mon Aug 25, 2008 9:46 am

veefer400 wrote:Jeez.... thats crap! Never heard of that one....
best to just fit the new head, Which Vee4 is this??

NC30

veefer400 · Post by **veefer400** » Mon Aug 25, 2008 10:43 am

at least spares wont be a prob... did the owner say anyhing about this??

Post by **Dgeoff33** » Mon Aug 25, 2008 11:06 am

it's a regular thing i'm afraid.I take mine to an engineering company to have them welded back on.

Or I could sell you another engine.

thrasher · Post by **thrasher** » Mon Aug 25, 2008 11:10 am

its a common thing im afraid.
why dont you get the mounts welded back on?

redlinerpm · Post by **redlinerpm** » Mon Aug 25, 2008 11:16 am

whats the base metal of the casting???? anyone know???

I could get them welded on at work. The thread needs cleaned out (I havent checked the bolt yet but is a 14mm fine?)and maybe a helicoil fitted on one side. When we weld alloy or castings at work we need to heat treat them to bring them back to the materials original condtion(depending on the material)
But I will look into it, as like I said the engine run nice!

cheers guys, these forums are a wealth of information !

thrasher · Post by **thrasher** » Mon Aug 25, 2008 11:36 am

i do the same when i tig cast ally, preheat it and use a silicon ally filler rod
others on the forum have had the mounts welded back on in the past.

Post by **CRM** » Mon Aug 25, 2008 12:02 pm

As others have said its more common that you may think. A front ender is a safe bet to break at least one, a side slide can also do it - must have been a fair old drop and i would say its more likely a front end at sometime in its life. Not the end of the world though, motors are readily available and cheap, and if the motors out it can be repaired easily.

NC35! · Post by **NC35!** » Mon Aug 25, 2008 1:44 pm

redlinerpm wrote:whats the base metal of the casting???? anyone know???

I could get them welded on at work. The thread needs cleaned out (I havent checked the bolt yet but is a 14mm fine?)and maybe a helicoil fitted on one side. When we weld alloy or castings at work we need to heat treat them to bring them back to the materials original condtion(depending on the material)
But I will look into it, as like I said the engine run nice!

cheers guys, these forums are a wealth of information !

Hi there,

The thread is an M10x1.25mm. I have a spare front head for an NC30 if it is any good to you?

Thanks

Forward engine mountings sheared :(

Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(

Re: Forward engine mountings sheared :(