| Also known as | 10-10300, JRC 10-10300 |
| Listed in parts books | Not catalogued by year yet |
RACING SPRING KIT BSA 250/441 - KWPM .400 LIFT
Racing valve spring kit for BSA 250/441 singles, matched to a .400 lift (KWPM) cam profile.
This is a racing valve spring kit for BSA 250 and 441 singles, built around a .400 lift cam profile (the KWPM grind). It's a kit rather than a single spring, so figure on both valve springs and whatever hardware comes packaged with them for that application.
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Our records on this one are thin — it comes from a single catalog listing rather than a run of parts-book appearances, so we don't have more detail on fitment specifics beyond what's stated here. If you're building a 250 or 441 engine around a .400 lift cam, this is worth checking against your cam card and head before you order.
Call the shop and we'll confirm fitment before you order — this is a BSA-specific part, not a Triumph one, so make sure it matches your engine before it goes on the bench.
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