JIMS Twin Cam 120, 131, 135 User Manual
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Spark Plugs ____________________ Gaps ________________
Ignition System _________________Oil Pumps _____________________
Heads ____________________________
Modified Heads __________________________________
SECTION 3
ENGINE AND TESTING INFORMATION
Date of Installation ____________________
Motorcycle Serial Number ________________________________
Transmission Ratio (Pulleys)_____________________
Gear Ratio ____________________________
Carb Jetting:
Main ___________ Slow __________Needle ______________________
Bleed down Test Results Front: ___________ Rear: ____________
Systems: _____________
Compression Test Results Front: ____________________Rear: ______________________
Dyno Test Results HP _____________________ Torque ____________________________
Dyno Charts __________________________________________________________________
MOTOR WARRANTY / RETURNS
JIMS shall not be liable for any consequential or incidental damages resulting from a failure
of any JIMS motor, the breach of any warranties, the failure to deliver, delay in delivery, de-
livery in non-conforming condition, or any other breach of contract between JIMS and a cus-
tomer. Each part returned will be inspected for damage due to improper packaging/ shipping
or damage that occurred prior to JIMS receiving the part. After inspection of the motor is com-
pleted and there is any incidental damage the customer will be notified immediately.
MOTOR WARRANTY PROCEDURE
See terms and conditions in the JIMS catalog for authorization to return parts.
The following requirements must be met before JIMS will authorize the war-
ranty return of a motor/ transmission/ flywheel assembly:
1.
Must provide proof of the date of sale from the dealer (copy of invoice, in-
voice # or Warranty card).
2.
Must provide detailed description of problem with motor.
gine.
Break-In Procedure:
Note: Follow the engine break-in procedures outlined in the Harley-Davidson
owner’s manual per your application.
1. Allow the engine to warm-up before riding.
2. Do not use full throttle.
3. Do not idle the engine for more than two minutes. Note: Even less if the air
temperature is above 80-degrees Fahrenheit.
4. Do not load the engine at low rpm.
Note: All engine loads must be moderate.
5. Vary the rpm frequently.
Note: Do not hold a steady speed.
6. First 50 miles:
• Do not let the engine rpm exceed 2500.
• Do not exceed 50mph.
7. Next 500 miles:
• Do not let the engine rpm exceed 3000.
• Do not exceed 55 mph.
Oil Change Intervals:
Break-in: • At 50 miles
• 500 miles
• 1000 miles
Normal Oil change intervals:
• 1500 to 2000 miles, depending upon usage.
• Change the oil filter every oil change.
Torque Checks:
• Re-check the torque of all accessible engine and chassis fasteners at all oil
changes. (Do not re-torque the head bolts)
Inspection and Service Wear information for Valve Train Components Used in
Performance Twin Cam Engines:
Valve Train Components should be inspected every 5000 miles of service more often
if an engine is used under severe riding conditions, i.e. full throttle race operation,
in city, dusty, low octane usage, trailering and two up. As with all high performance
engines, components are under or subject to more stress in one-way or another,
many times more then a stock engine. The following engine components will need
to be inspected and or replaced every 5000 miles or more often as needed.
1.
Rocker Arm / Rocker Arm Shaft replace if more than:
• Shaft fit in bushing .0035
• End play, side clearance .025
• Shaft fit in support plate .003
2.
Cam Support Plate, replace parts if more than:
• Cam chain tensioned shoe wear .090 or 1/2 thickness of shoe
• Crankcase bushing press fit in cam support plate .0008
• Crankshaft bushing maximum I.D. .8545
3.
Hydraulic Lifter Replace if more than:
• Fit in crankcase .003
• Roller end clearance .015
• Roller fit on axle .0015 or any rough area or tight spot
( With Cover? • Yes • No )