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tommy12gunz
09-08-2016, 11:00 PM
Im new to all this but just couldnt resist buying this 2001 johnny pag spyder but the the little 250 engine is not enough im have some limited mechanic skills and think i could do a engine swap can anyone please tell what 400cc to 450 cc engine can do a direct engine swap with this bike i need a year and model so i can search for one i hear the rebel and cm and cb 450 motor will work but what year do i search for and are the engine mounts the same

3dee
09-09-2016, 8:07 AM
Hey buddy I had a 2007 Spyder that I was going to swap the engine in. Had everything bought and ready and was ready to go but things changed and had to sell everything. I had a gs500 engine but the fit would have been real tight. I would probably go with a gs 450 if I was you. There are many on ebay for sale. And by my measurements either of the engines line up pretty darn good.

Westboundbiker
09-09-2016, 10:02 AM
the 450 and 500 have the same dimensions (approximately), so if the 500 was tight, the 450 would be too.

tommy12gunz
09-09-2016, 10:24 PM
everywere i see they always say the 450 out of a 86 or 87 rebel i love this thing i got it for $500 the guy is having a baby and needed the money quick but going to ebay and check on those motors thanks do you know of any good sites that can give me help on the swap71978

Phantom309
09-12-2016, 4:37 PM
everywere i see they always say the 450 out of a 86 or 87 rebel i love this thing i got it for $500 the guy is having a baby and needed the money quick but going to ebay and check on those motors thanks do you know of any good sites that can give me help on the swap71978

I have actually seen a picture of a Spyder with a Yamaha XS 650 engine, so you could compare your measurements to one of those, to see what might fit.

3dee
09-15-2016, 9:43 PM
XS650's are great engines but good luck finding one cheap. Not sure about rebel engines. Just measure it out well. Also, I think spyder 300 frames were a bit bigger than yours which makes it even more difficult. What about LS/Savage 650 motors? They re compact and plenty powerful.

3dee
09-15-2016, 9:45 PM
I just remembered that those were belt driven.