| Author | Message | ||
     Kilgore1826 |
Help! Motor blew. My only option is to re and re the motor. Looking at a low mileage lightning motor. Does anybody know where I can find a compatibility chart or can any of the venerable ones help me? Andy | ||
| Hughlysses |
Yes, it will fit. I installed a 2009 XB12R engine in my 2007 Uly. However, you will have to install an 08 or 09 Uly wiring harness, voltage regulator, 08-up ECM, oil cooler, oil cooler mount, and oil cooler lines to make it work. The 08-up engines have the improved oiling system, and the improved crankshaft with larger crankpin and strengthened rods. The improved oiling system requires a larger oil cooler. They also have a different throttle body with an Idle Air Valve (IAV) and a crankshaft ignition trigger that is not compatible with the pre-2008 wiring harness or ECM. There may be some way to make the 08 ignition trigger work with the 07 ECM, but I was never able to find any details about it. If that was possible, you could install the 07 throttle body on the 08 engine and keep the 07 wiring harness and ECM. You should be able to source all the parts except for the wiring harness from the 08 Lightning. It may be possible to adapt the Lightning wiring harness to the Uly. The Firebolt wiring harness is very different as the ECM is mounted in the cowl rather than under the seat. I gave up on trying to adapt it and paid ~$350 for a new Uly wiring harness. Earlier XB12 engines would be a direct bolt-in. I would recommend staying away from 2007 engines because of the known crankshaft issues. The 2006 engines are practically identical except for a minor difference in the oil pump (smaller scavenging section). The 2005 and earlier engines have a slightly different transmission which doesn't shift as smoothly. So, to summarize: 06 or earlier engine swap- easiest and quickest Rebuild existing engine- fairly expensive and time-consuming. Recommend you install 08-up crank as part of the rebuild. 08 or later engine- Gives you the best XB engine, but requires extra parts. (Message edited by Hughlysses on October 14, 2015) | ||
| Teeps |
Though I have not done this conversion... But I know enough about EFI to be dangerous. He's going to need the '08 ECM; the '07 ECM does not have the logic circuits to operate the '08 EFI. A '09 or '10 ECM may well work too, but you can't go wrong with using the same year model parts in any conversion like this. Al @ American Sport Bike, froggy or firemanjim will know for sure about the EFI and parts compatibility. (Message edited by teeps on October 14, 2015) | ||
| Hughlysses |
Teeps- I was thinking he could use the 07 throttle body and injectors on the 08 engine. The gets around the EFI problem. The big issue is adapting the 08 ignition trigger to work with the 07 ECM. The 07 ignition trigger is on the end of one of the camshafts, which rotates at half crankshaft speed. The 08 ignition trigger is on one of the crankshaft flywheels, and there are a series of uniformly spaced "notches" around the flywheel which cause it to trigger. It appears that the 08 sensor produces a LOT more pulses than the 07 sensor produces. The 08 ECM must process the sensor triggers different compared to the 07 ECM, so I'm betting there's no easy way to adapt it. There's definitely no practical way to adapt the 07 ignition trigger to an 08 engine due to the different oil pump setup. | ||
| Phelan |
'07-up TB system is the same as the '08-up, yes. | ||
| Hughlysses |
'07-up TB system is the same as the '08-up, yes. It is most definitely not the same; the 08-up TB has an Idle Air Valve (IAV) which the 07 does not. The 08-up ECM is configured to control the IAV to maintain idle speed. The 07 just has a manually adjusted throttle stop to maintain idle speed. I believe either throttle body will physically fit on either engine. That still leaves the problem of the vastly different ignition triggers on the two engines. | ||
| Teeps |
Understood Hugh... Both posts by you above. If I was doing an engine (forward) update. I'd go all the way with the latest EFI. (Message edited by teeps on October 14, 2015) | ||
| Tootal |
Andy, I don't know your background but if you were comfortable with pulling the engine and removed the top end I would send the bottom end to Dark Horse Crank Works. Have them upgrade to the 08 crank. Get your pistons first if not reusing the old ones and have them precision weighed so you can give that info to Dark Horse. They will properly balance and weld the crank for your pistons and you will have a really smooth, better than new engine once you put the top end back together. These guys did the crank in my Big Twin Harley and it's amazing how smooth it is. Now if you're not mechanically inclined then Hugh is right on. You can get an 06 engine and put the 07 oil pump in it if you want. It has a little better sump flow than the 06. | ||
| Phelan |
Sorry, got my years mixed up. | ||
| Kilgore1826 |
You guys rock! Thank you for sharing your knowledge. Unfortunately I lost out on the auction on Copart as I was scrambling to get a broker. Back to searching. It may end up being a part out if I cannot find a motor at a reasonable price. Thanks again guys. Andy | ||
| Phelan |
What all is damaged in the motor? It may be more cost effective to R&R the current motor if it is salvageable. You can get the -08 crank and rotor for under $800 from Surdyke. |
