[RMK-KING]

I have a extra EFI box off a 94 indy 500 EFI,but that sled had the same problem of the fuel pump not working. Im pretty sure the fuel pump just needed to be replaced though. So if you wanted to try mine you could.

I switched the sled over to carbs instead like you just mentioned above. You can use your EFI engine you have now,you just need to drill a hole in the crankcase for the fuel pump pulse line,the hole is already there for it you just need to finish drilling it through. Then get different carb boots, and then install the mechanical fuel pump,carbs,throttle and choke cables.

The carb and EFI boots are a different bolt pattern,you need to use the boots from a 91-92 carbed indy 650 which is a discontinued part and very hard to find. You can also use a carb boot from a 80s yamaha, part # 8G8-13555-01-00. You can type it in and order it here http://www.ronniesmailorder.com/fiche_select.asp

I think the sled ran stronger with carbs then it did with the EFI,alot more responsive anyways.

 

[RMK-KING]

Any Mikuni slide VM38SS carbs will work, you can usually find them on ebay with all the cables and sometimes even the fuel pump for around $100. The oil injection is unaffected by the conversion.

 

[RMK-KING]

The indy lite only had 30mm carbs which is to small.

Here is a pair of good looking carbs
http://cgi.ebay.com/ebaymotors/POLARIS-INDY-500-Pair-of-Clean-Carburetors-4B26A_W0QQcmdZViewItemQQhashZitem5d23814d5cQQitemZ400027635036QQptZSnowmobileQ5fPartsQ5fAccessories#ht_1097wt_735


Throttle cable
http://cgi.ebay.com/NOS-Polaris-Indy-500-XCR-440-Throttle-Cable-7080373_W0QQitemZ360137710588QQcmdZViewItemQQptZSnowmobile_Parts_Accessories?hash=item53d9e15bfc#ht_608wt_9610

Couldnt find a choke cable on ebay for it, I would either wait till a auction complete with carbs and cables comes up,or try calling a sled salvage and see what kind of deal they will do.



Might be worth seeing what this kid all has to,I see he has the 38mm carbs you need. http://www.snowmobilefanatics.com/forum/topic/108323/display.aspx