You will have a harder time finding general replacement parts for the 87/88 year model RM. I would actually do a resto build on that 79' RM, then you would have enough money to buy a much newer bike if that's what your looking for. There's quit a few vintage part companies that make parts for that 79', but on the other hand there aren't many aftermarket companies that make parts for the 87/88' due to the year model. For example, for some of the 1970's and 1981-1982 RM's you can still buy replacement OEM cylinders from Suzuki, but with the 87/88' year model RM you will see there are also LESS OEM parts still available from Suzuki.