In development for 3 years, Indy Specialty has designed and is now manufacturing a full Billet 850 Crankshaft.
This crankshaft was designed with one Major thought in mind...... ( dependable ) High Mileage
The most significant change is in the PTO - end ..... which can be used to replace the stock OEM PTO-end.
The 850 Patriot motor is one of the best designed High Horse Power to weight ratio motors I have ever seen.
However the 850 has the worst designed PTO-end, and worst PTO Bearing design for a 2 stroke motor with a press together crankshaft I have ever seen.
The stock PTO - end will haunt the 850 as it gets older, and when the drive clutch starts to wear badly.... when the drive clutch gets worn the PTO-end in many cases will slide hammer off the Rod Pin and it will run into the crankcase and the roller bearing at close to the same time.
And the motor will lock up..... it’s been happening already to the 900 Big Bores and some stockers as well.
The 850 Patriot has been one of the only motors we build with no crankshaft warranty...... And the reason we do not warranty it is because I do not trust the OEM PTO-end to stay on the Rod pin long Term.
That is the reason we built a full Billet Crankshaft is so we could offer a warranty......Our Crankshaft the OEM Roller bearing is no longer used.... It’s gone ( We do not use it anymore )
Dan
This crankshaft was designed with one Major thought in mind...... ( dependable ) High Mileage
The most significant change is in the PTO - end ..... which can be used to replace the stock OEM PTO-end.
The 850 Patriot motor is one of the best designed High Horse Power to weight ratio motors I have ever seen.
However the 850 has the worst designed PTO-end, and worst PTO Bearing design for a 2 stroke motor with a press together crankshaft I have ever seen.
The stock PTO - end will haunt the 850 as it gets older, and when the drive clutch starts to wear badly.... when the drive clutch gets worn the PTO-end in many cases will slide hammer off the Rod Pin and it will run into the crankcase and the roller bearing at close to the same time.
And the motor will lock up..... it’s been happening already to the 900 Big Bores and some stockers as well.
The 850 Patriot has been one of the only motors we build with no crankshaft warranty...... And the reason we do not warranty it is because I do not trust the OEM PTO-end to stay on the Rod pin long Term.
That is the reason we built a full Billet Crankshaft is so we could offer a warranty......Our Crankshaft the OEM Roller bearing is no longer used.... It’s gone ( We do not use it anymore )
Dan
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