| Also known as | 70-0300, JRC 70-0300 |
| Listed in parts books | Not catalogued by year yet |
VALVE SPRG 650 RACE TRI
A race-application valve spring listed for the 650cc Triumph twin.
This is a valve spring listed for the 650cc Triumph twin, described in our records as a race-application spring. Valve springs close the valve after the cam and rocker have pushed it open, and a race-spec spring is typically wound stiffer than a stock spring to control valve motion at higher engine speeds.
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Our information on this part number is limited beyond what's noted here. If you're building a 650 twin for the track or a hot-street setup and are looking at valve springs, give us a call and we can talk through what you're trying to accomplish and confirm this is the right spring for your combination.
Because valve spring selection ties closely to cam profile, valve gear, and how the engine is going to be run, we'd rather talk it through with you than have you guess from a parts list alone.
Sorry if we got something wrong here. If you think this information isn't correct, .