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6. Remove the left hand thread nut holding the CFD to the transmission input
shaft using the CFD gear stop (#EAMU0004) and a 19mm socket.
7. Remove the clutch nut / starter gear that holds on the clutch using the
clutch nut removal tool (#ECMU0078).
8. With the Cobra flywheel / clutch puller (#MCMUTL70), remove the clutch
from the crankshaft (details in Clutch Service portion of this manual).
Top End Disassembly Procedure
1. Remove the cylinder head nuts (10mm).
2. Remove the cylinder head outer.
3. Remove the cylinder head insert.
4. Remove the cylinder.
Muriatic acid can be dangerous. Follow the manufacturer’s instructions closely.
5. Remove the piston clip with a scribe.
6.
Remove the piston pin with a piston pin remover
INSPECTION NOTE:
Inspect the cylinder bore for abrasions, deposits, and missing coating.
1. If abrasions: scrapes, scratches, pitting, etcX are found, replace the
cylinder.
2. If deposits are all are found
a. Clean with muriatic acid.
b. Once the deposits are removed, inspect for abrasions and
missing surface coating.
i. If there are abrasions or missing coating, replace.
ii. If all looks well, the cylinder may be saved.
INSPECTION NOTE:
Inspect the cylinder head for deposits and abrasions.
1. If there are deposits they should be removed
a. Black oily deposits (indicating a rich mixture or improper oil
type/quantity) can be removed with solvent
b. Crusty deposits (indicating dirt ingestion) can be removed with
solvent and may require some scraping.
2. Abrasions
a. Pitting or erosion indicates detonation and may require cylinder
head replacement, also
i.
Retard the ignition timing
ii.
Use a higher octane fuel
b. Missing chunks or indentations indicate broken hardware or
ingested items - replace the cylinder head.