+4 hotrods install... crankcase "bored" pics

[BlasterAzores]

When instaling a 4+ crank the crankcase needs to be bored out, so here´s some pics from my crankcase after being worked on...

this as to be done on both sides.

 

[yb200]

looks good man who did the machining

 

[BlasterAzores]

looks good man who did the machining

Local shopp, they also fixed my front spindles wich had some gap, made new rods, and are now finishing the 240cc kit, might get it this week.
Something like this was wayyyy out of my leag, soooo im paying $150 to get it all done.

 

[brandoz28]

thats really not bad to have that machine and assembly work done. looks good bro

 

[Paulie B]

Very nice!!!!!!!!!!

 

[blastermaster01]

Nice. Doesn't seem like $150 is that bad..but I don't know.

 

[BlasterAzores]

Does anyone knows if there is a kit for the inside engine bearings ?
I took a look at mine and they dont feel right. Since the case is open i guess now is the time to replace them.
I tried ebay... no luck.
Anyone ? some info ?

 

[Paulie B]

Does anyone knows if there is a kit for the inside engine bearings ?
I took a look at mine and they dont feel right. Since the case is open i guess now is the time to replace them.
I tried ebay... no luck.
Anyone ? some info ?

Are you talking about the main bearings- the ones in the case that the crank rides on?
They should be everywhere but check RJATV.

 

[BlasterAzores]

Are you talking about the main bearings- the ones in the case that the crank rides on?
They should be everywhere but check RJATV.

Those came with the new crank, i need the smaller ones.
First picture... 3 smaller bearings by the rightside.

 

[brandoz28]

just google blaster parts and look around you'll probably have to buy real yamaha stuff....

 

[BlasterAzores]

Got the info... thanks guys.

 

[stephen12091985]

go to bikebandit.com you will find them there

 

[atvmxr]

wow!! thats leaving some thin wall material for the lower bolt holes... :-[

 

[BlasterAzores]

wow!! thats leaving some thin wall material for the lower bolt holes... :-[

same thoughts here ... a bit worryed about that, but worst-case scenario, i have a spare crankcase. (just needs new covers, shift and kick pedal )

 

[yes se-r]

i think you mean it was trenched..not trying to be a dick but there is a difference lol

 

[BlasterAzores]

i think you mean it was trenched..not trying to be a dick but there is a difference lol

I:I Ill take youre word for it. Technical english is a bit rusted.... lol i know in portuguese that case was " rectificada "

 

[blasterfreek30]

looks like a nice job done

 

[yes se-r]

I:I Ill take youre word for it. Technical english is a bit rusted.... lol i know in portuguese that case was " rectificada "

hah for real its all good just looking out and making sure i knew what you were talking about. idk about any rectifiying though

 

[desgre90]

Looks good. Hopefully you will not experience a failure between the balancer and crank passage. When I picked up my used stroker motor that I planned to rebuild, I found both cases damaged in that area. We found that who ever did the work before machined it with .04 clearance which is double what hotrods says is the minimum. I think were going to shoot for .03 when I get my new cases bored next week and if it is too thin he was considering to attempt to dynamically balance the crankshaft to do away with the balancer, and that would give us room to strengthen the passage. Time will tell...

 

[slickerthanyou]

I got all the my bearings from Cheapcycleparts.com took a week to get them but I figured the same as you got it apart what the hell!