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Discussion Starter · #1 ·
Hi Guis ! Where can I connect a tachometer in Rebel 125CA ? Is it electrical or mechanical meter ? How it looks like ? Thanks in advance. Gábor
 

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use an "inductive tachometer", google for local source
 
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Would the Rebel's "wasted spark" need to be taken into consideration/calibration?
 

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Would the Rebel's "wasted spark" need to be taken into consideration/calibration?
Yes it would, there may be a setting to account for pulse every 360° revolution. Ones I've read instructions for do have method to adjust.. If there is no adjustment setting indicated RPM would be double actual revolutions..
Wired Analog tachometers also have the same discrepancy, many Universal versions have a switch to adjust for wasted spark engines..
 
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Discussion Starter · #9 ·
Hi ! Sorry, I do not understand, what is the wasted spark. As I think becose this is four-stoke enine one cyinder ned spark every secund revolution, realy have got in every revolution both cylinder?
In the tachometer there are two button. You can adjust 2 or 4 stroke type.
Gabor
 

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Both spark plugs fire with every revolution of the crankshaft, but only one cylinder is in the compression position. The other cylinder is in the exhaust position when that plug sparks, so it is "wasted". Even though the Rebel engine is 4 stroke, you should set the tachometer to 2 stroke due to the wasted spark system.
 
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^^^^^ What flitecontrol said ^^^^^
But some tachometers have settings to adjust for 1 spark per revolution
Font Number Screenshot
 
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Discussion Starter · #12 ·
Both spark plugs fire with every revolution of the crankshaft, but only one cylinder is in the compression position. The other cylinder is in the exhaust position when that plug sparks, so it is "wasted". Even though the Rebel engine is 4 stroke, you should set the tachometer to 2 stroke due to the wasted spark system.
Thak you very mutch. I hve ordered a tachometer to adjust the PILOT screw.
Both spark plugs fire with every revolution of the crankshaft, but only one cylinder is in the compression position. The other cylinder is in the exhaust position when that plug sparks, so it is "wasted". Even though the Rebel engine is 4 stroke, you should set the tachometer to 2 stroke due to the wasted spark system.
Thanks !
 
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