engine built
- Thread starter general_lee
- Start date
Yeah I didn't see that the first time I looked at it. I have a +3 and I had to shave a tiny amount off my case with a file. It was only a mm or 2 on my cases and it was probably overkill because I wanted to be positive there wasn't interference, It wasn't anything nearly as radical as what you did. How does that thing run with the +4? Is it a stuffer like the Vito's?
3mil is a direct bolt in, HOWEVER you should remove a little material where rod gets close to cases by bottom of cylinder (or at least check it). Vito's site says "no machining- see details" bet that's what they explain. The photos with green Sharpie show the area needing attention, but not size of marked area. I think the vid for the 6mil build installation shows this also.
The 4mill does not have stuffer blocks
The 4mill does not have stuffer blocks
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@general lee The +3 cranks 4 out of 5 times you will have to do some hand grinding to clear the rod.There are cases where it will clear but it's not worth it to get the lower end together and find out.I have installed many of them and only one has ever cleared with no grinding.
Thanks bro. Thanks for posting nice clear pics of a correctly trenched +4 cases. They look awesome.Nice job!! Im sure that die grinder took awhile to do it that way and didn't last very long at that.
alright got it. ill be ordering the crank next week , i just found a cylinder still on stock bore , head ,reeds , flange and eaxaust flange for 200$ ill be picking that up monday , gasket kit is on its way. imma put a new piston what yall reconmend? wiseco pro lite are 95$ to my door is that fair?
It has been said before and I'll say it again:
Wisecos are a tough piston, but need a careful warm up to prevent "4-square" seizures.
For the same reason they do not handle overheating all that well either.
If you go a cast piston it is important you keep the skirt clearance in specification.
With those caveats you can use any Blaster piston you desire.
Wisecos are a tough piston, but need a careful warm up to prevent "4-square" seizures.
For the same reason they do not handle overheating all that well either.
If you go a cast piston it is important you keep the skirt clearance in specification.
With those caveats you can use any Blaster piston you desire.
I always have to laugh at the term 4 point or 4 corner seize on a piston. How can there be a corner on a round object?? :-/ 
Tho if one looks, the point (or area) where they seize is where there is the most material in the piston. I:I
Old joke: How do you drive a Polack crazy? Put him in a round room and tell him there's a penny in the corner !! I:I
Tho if one looks, the point (or area) where they seize is where there is the most material in the piston. I:I
Old joke: How do you drive a Polack crazy? Put him in a round room and tell him there's a penny in the corner !! I:I
The points of most expansion, in my days that problem was solved by barrell grinding and making the skirt oval.
Or give them a bit of paper with P.T.O. written on both sides.
Ahh yes, back in the days ..............
I did a T-500 drag bike, .002 off from crown to just below rings, then hand sanded skirt each side .0005, honed pin hole for slide fit, add oil holes for pin.
Now pistons come tapered and oval, not much young uns, just enough.
I did a T-500 drag bike, .002 off from crown to just below rings, then hand sanded skirt each side .0005, honed pin hole for slide fit, add oil holes for pin.
Now pistons come tapered and oval, not much young uns, just enough.
Them were the days, epoxy smeared around the crank to minimise the volume of the transferred air/fuel charge to suit the kinetics of the guessed volume of the header pipe.
Where a good pipe was measured from the exhaust outlet and tuned by ear as it barked its message to the crowd, Ahhhh I remember it well.B)
I always have to laugh at the term 4 point or 4 corner seize on a piston. How can there be a corner on a round object?? :-/
Tho if one looks, the point (or area) where they seize is where there is the most material in the piston. <SOME SNIPPED>
Corners formed when you were not looking, driving too hard on a cold engine.
It is the now cornered piston in a round bore that is the problem!
<GRIN>
Steve
Wiseco's can fail too! Piston failure is not just for cast pistons like a few folks would like you to believe.
Failed wiseco pistons...
Failed wiseco pistons...
So i bought a cylinder on stock bore , head and reeds with boot for 175$, waiting to get it so i can make sure what size piston to put, so i guess ill run a wiseco pro lite since ive been using wiseco in pretty much everything . If the rid bearing is still good i might not buy a 3mill crank right away and slap new bearings on the old crankWiseco's can fail too! Piston failure is not just for cast pistons like a few folks would like you to believe.
Failed wiseco pistons...
