Factory Racing Throttle Bodies

Click on photos to enlarge, they will open in a new window.

RSR Throttle Bodies ~ 934.5 ~ 935 ~ 962

RSR Throttle Bodies a.k.a. High Butterflies:   One Pair - Refurbished and re-machined yellow zink plating service flow tested, ready to run.   Estimate: Please call.*

1) The worn out factory-assembled kind: These will require new bushings, a small overbore, new throttle plates. Occasionally one or more throttle shafts and/or couplers need to be replaced. Price will vary depending on parts needed.

2) The kit kind: Sold through Vasek Polak for years beginning with very complete kits and then with fewer original parts as time went on. Quality of the finished product is variable: Some were assembled with necessary skill using the factory parts. For example, a number of kits from the '70s through the '90s were carefully assembled by Norbert Eberhardt, the founder of Eurometrix. These will not have assembly-related issues but could have wear issues, depending on use. Price similar to #1 above. Many kits were assembled without the needed attention to detail and with missing or fabricated parts. It is common to see High Butterflies with the wrong shaft couplers, throttle plates that don't fit properly, missing rear return springs and without shims. Because they never worked properly to begin with they don't have wear issues. They need to be carefully reassembled with the correct parts. No machine work may be required but could be costly depending on missing parts.

Return to top

934.5   One Pair - Needle bearings replaced, re-machined overbore, new throttle plates using correct bevel angle. Yellow zinc plating service, flow tested. Ready to run.  Call for a price.*

*Price depends on additional parts needed.
Typical wear pattern: worn bearings, grooved and/or warped bores, worn couplers
Well preserved: throttle shafts.

Return to top

935  One Pair (As for 934.5) - Needle bearings replaced, re-machined overbore, new throttle plates using correct bevel angle. Yellow zink plating service, flow tested. Ready to run.   Call for a price.*

*Price depends on additional parts needed
Typical wear pattern: as for 934.5
Well preserved: as for 934.5

Return to top

962   One Pair (As for 934.5) - Needle bearings replaced, remachined overbore, new throttle plates using correct bevel angle. Yellow zink plating service, flow tested. Ready to run.   Call for a price.*

Typical wear pattern: as for 934.5 throttle shafts
Well preserved: nothing

*Price depends on additional parts needed.

Return to top