I would love to see the original motor running! No matter what goes in I will be keeping this engine and getting it running one day! I may have already shot myself in the foot with an 848 swingarm!
Easy enough to weld the holes back up and drill it 10mm again, although you'd need to repaint. Or you could make a custom washer. Using 12mm bolts would be the best option though - they must be better than 10mm...
Depends on if you have a lathe or access to one, I have one so I took the easiest option. I appreciate that drilling is the easiest way to do it. You would have to sleeve the frame if you want to revert, as the tolerances are finer than is immediately obvious.
Electrics\loom, using the original instruments and air box are the things that spring to mind. It's good if you like a challenge. Easiest of all is to put a 998 motor in but you would need to modify the frame tubes or use a 748R\988 frame but it would be a straight bolt in using a 998 loom and injectors\airbox. The only other problem after that would be coil mounts as they are in different places on a 748R compared to a 998 frame.
From what I understand I would need a 998 Loom to use my original clocks with the 848 motor, also I shouldn't need to modify the frame if I flip over some of the throttle body linkages? Providing I get the right parts it should be a fairly painless build :biggrin:
To fit the 848-1098 motor I believe you can use the 748 loom and Ecu with a re-flash, the coils will need moving or you can use the stick coils with a small mod to the loom. The Airbox needs a bit of thinking about and is probably the hardest thin to do neatly. Exhaust wise you want to retain the stock look, you need a large OD deep sump exhaust i.e 996r 998s, which will need modifying to fit the 848 exhaust flanges. I've just modified a 748r system to fit a 848 evo motor for a customer, which works ok but far from optimal as the 848 exhaust headers are 9mm bigger in diameter.
I went to collect the engine from MotoCorse UK yesterday and ended up coming home with 2 useless engines instead of one :tongue: Tony had a 748 engine with a blown bottom end lying around and I thought it may be worth having as something to practice on. So plan is to strip this blown one and see what issues I come across - then make the decision to tackle the SPS engine myself or not!! Everyone has to learn somewhere! and it would make keeping the original motor economically viable :tongue: any pointers / tips / pics?? :biggrin:
The primary gear is very difficult to get off, it's best to use the correct tool but an hydraulic puller might do it. Crankshaft shimming is vital to avoid loading the main bearings and finally make sure the gearbox is correctly shimmed and all the gears and dogs engage correctly and the shifter mechanism is set up correctly. Check the crank big ends and repalce as necessary using the correct torquing method It is a big job and to be honest if you are not adept at these things then maybe pulling it apart and having some else rebuild after you have cleaned and sorted the engine bits out might be a good alternative.
Making a sleeve only leaves it with a 1mm/40thou wall thickness. I would be inclined to drill the frame and make good the thicker bolts.
I know a bit about that motor............it's an SP spec one out of a 1997 bike. I spent a bit of time making it into a steam kettle on the A41................
This will probably be the way to go Ha :tongue:! what happened? Seems pretty clean (compared to mine!) - a shame its no good!
And label them clearly if necessary with notes on orientation and anything else that's relevant. It's easy to forget when all of a sudden you are surrounded by parts that are unfamiliar.
