Thought I'd share something I discovered today while looking through some of my stuff stuck back in the corner, which by the way should have been done by now...LOL!
Anyway, somewhere about 1.5 to 2 years ago I bought a lower engine assembly from Lucky Early Bird LEB/BGF, I had noticed back then that the crank in this engine looked to be much better made than all the others I have or have seen, turns out after taking a good look at the crank that is in the "balanced" lower that I just received a few days ago from Duane at Thatsdax, it is the same crank that is in the Pk-80 looking engine that I had gotten from LEB back then, seems if I remember I had posted pics and commented on the crank being drilled in a way that looked as if they were intending for it to be a better balanced lower, it also has very good looking bearings in it including the wrist pin bearing that is made so that the rod will not have that typical side to side play that has been claimed to be the possible cause of that upper bearing failing in many engines which I have experienced myself.
So it looks as if I have two of these "beefier" built better "balanced" lowers now.
Pics I have listed here are pics of the crank removed from the LEB engine which is identical to the crank that is in the "balanced" Dax lower I just bought from him, Duanes lower looks really good, great upgraded bolts and studs and everything about the case looks to have a really nice even fit, excited to get started putting this engine together as soon as I get the other parts rounded up and get me some good gaskets made up.
Peace Map
I am wondering if you have a StarFire lower. It is suppose to have a balanced crankshaft.
Here's some pictures from Grubee under Great Magneto Mystery:
http://motorbicycling.com/attachment.php?attachmentid=60930&stc=1&d=1372745857
http://motorbicycling.com/attachment.php?attachmentid=60931&stc=1&d=1372745874
Chris
AKA: BigBlue
Thanks for the input here BigBlue,
I ordered the engine from LEB/ Lucky Early Bird off of Ebay back then, it was listed as a Model X80A engine on the site add, the crank has the two balance holes drilled in it just like the crank in the new balanced Dax lower I bought from him a couple weeks ago, the LEB engine looks just like the PK-80 Engine that Pirate Cucles sells, entire engine had a real nice coat of metalic gray paint on it and it has the longer bent clutch actuator arm also, was by for the cleanest looking engine out of the box I had seen, the intake and exhaust ports are also larger on it than any of my other engines, just took a couple of picks to show the difference.
I'm gonna use the larger port jug on my new Dax Lower, I like the look of the larger ports and the cooling fins are a bit bigger, the transfer ports are shaped different and are larger also.
I'll give this one a shot and we'll see how she works.
pics below show difference in port sizes and neither have had any work done on them yet as you can see from how rough they are, also a pic of the crank out of the LEB engine, notice the two holes drilled to lighten it on the rod journal side of the counter balance.
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Peace, map
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Your crank is a typical Grubee crank. It looks just like the one in my new GT5 Skyhawk. Its the same crank that GasBike.net sells for $12.50.
I've bought crankshaft assembly's from several venders, including the ones mentioned. All of them were so badly out of true I tossed everyone of them in the pile right out of the box.
The reason I knew those cranks were bad is, because of the 3 motor kits I bought that all had bad cranks.
Now I have 4 motors ready to build, but no crankshaft.
Yep, once you go DAX you won't go BAX!!!!!! And I talk Dwayne yesterday and he said "Ive only got six left". This it'll be a while until he restocks . Got mine ha ha !!
what kind of high quality crank do we expect for $18 ?