IJSBA · Engine
Ferrous-only is near-universal where rods are allowed at all.
This page is IJSBA only, and the bodies do not agree. The same part under IHRA. Which one applies to you is decided by whoever sanctions the race you enter.
20 classes, grouped where the same rule gives the same answer rather than listed one by one, because an answer that holds for a class usually holds for every class that borrows its rules.
Not permitted, not listed in the rules 7 classes
Not listed in this class document. Illegal under the closed-list principle.
Legal, with conditions 2 classes
Four-stroke ferrous rods with changeable length.
Legal, with conditions 1 class
Ferrous only; 110mm rods only.
Legal, with conditions 1 class
Ferrous only. Rod length may not change.
Legal, with conditions 1 class
Non-ferrous prohibited; rod length may not change.
Legal, with conditions 1 class
OEM rod length and journal diameters retained.
Legal, with conditions 1 class
Ferrous materials only; rod length modification allowed. · SKSS.3.7
Legal, with conditions 1 class
Ferrous only; rod length alterable.
Legal, with conditions 1 class
Ferrous only; rod length changes allowed.
Legal 3 classes
The crankshaft assembly may be modified or aftermarket and rod length may be changed, which covers the connecting rods.
Legal 1 class
Connecting rods may be modified or aftermarket as part of the crankshaft assembly, whose total weight must stay within +/-5.00% of original. · RSS.3.2
Aftermarket connecting rods: if the rule your class applies reads differently to you, or the rulebook has changed since this was read, ask. We answer with the section we read it from, or that we have not read it. Ask a rules question.
Every IJSBA class · where the rulebooks differ · checks on parts the shop sells · how this site reads a rulebook.
Engine · two and four stroke · legal in 13 of 20 answered, 9 with conditions