Topic: 750F3 530 conversion?

[jakecb420]

hi, i have searched through the archives about converting my f3 motor to a 530 front sprocket however it is a little hard to find a definitive answer. i have gather that there is no actual front conversion sprocket. so i am under the understanding that a regular 530 sprocket say from a 76 750f would work. do i need a spacer in there somewhere? anyone know what size if so?

what i am working with here is a 78 F3 motor in a 76F frame with a 530 rear sprocket. any help or clarification would be appreciated. thanks

[Tree]

Hi.  I have the same question you had back in Feb.  I'd like to covert a '78 750K.  I wondered what you ended up doing.

[jakecb420]

well, i found an ebay ad for a 530 conversion sprocket, however,  looking at the dimensions in the ad, it appeared to be the same as any 17 tooth 530 sprocket, i ordered it anyway. well, there is nothing conversion about it. its just a 530 sprocket. the difference i think between the stock sprocket and the 530 one is that the original has a raised middle on the inside, where as the new one is raised in the middle on both sides.(basically the new 530 one is a little wider in the center). my plan was the fit a washer in the gap between the shaft and the bolt that holds the sprocket on. i will get a new bolt that is just a little longer too, just in case those couple threads matter. its kinda hard for me to really comment on this setup as i have not put it all together yet, probably not gonna need a chain if i dont have any brakes yet. but when i get it together, i will post again.

[Tree]

I installed the 530 front sprocket with washer as  you described.  The washers I found that were about the right thickness and outside diameter (so they fit inside the sprocket center hole) had too larger an inside diameter.  So instead I got a couple of thinner fender washers which had the right O. Dia.  and drilled out the center so they fit on the screw.  I was going to use two stacked on the screw, but that was too think when assembled and I ended up using only one.  I think it probably would have worked without using any at all. 

[Danno]

there are sprockets with no hub on one side that can be used too the one hub they have goes on the inside toward the motor

[jtb]

Jake,  When I was at Cycle Gear looking for a 630 master link (there's something that's hard to find), the kid who ordered it for me told me he'd found a 530 conversion kit for the bike.  I didn't pay much attention, but next chain and sprocket change...

[jakecb420]

well, i got the chain on with my "530 coversion sprocket". it lines up just fine. no binding or anything so i will just have to see how it actually functions when the bike is complete. your conversion may be a little different as i am using an f3 motor in a f1 chassis, the f1 has a 530 chain to start so i just needed the front sprocket. i guess the "conversion kit" would have a chain and 2 sprockets. if you do end up changing your chain size with the kit, i would be interested to know how it works out.