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Gas Yamaha Gas Yamaha Golf Cars; G1 through "The Drive" and U-Max Utility Vehicles |
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#1 |
Not Yet Wild
![]() Join Date: Jul 2020
Location: Oklahoma
Posts: 23
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![]() Can the hei conversion mentioned for 2pg and 3pg motors work on a Yamaha J38 series motor? The plug and wiring is rough and I'm also not sure the factory ignitor is even working correctly so I was looking into this upgrade. Upgrades and more power are always good as well as saving the ton of money for the ignitor and coil 😂
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#2 |
Over This Interview Is...
![]() Join Date: Jun 2012
Location: AZ
Posts: 17,449
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![]() I see this one hasn't been touched. I'll answer. Yes, it probably can. (I wouldnt, so dont ask me how). But, heres why it shouldn't be done. The stock ignitor modifies ignition timing based on rpm, less timing at low rpm for easy starting, .more timing later for more power & better power/economy at higher rpms.
A HEI can probably be made to trigger the coil, but it cant do anything to advance the timing as rpms increase, so the base timing that would allow easy starting would be the timing used across the entire rpm range. That's not good. The "lazy" timing that allows easy starting is far from good for the rest of the rpm range of the engine. Also, the crank trigger at the flywheel is not adjustable to "pick a better spot" either. (That task of "pick better timing" was handled by the original yamaha ignitor based on rpm). Can it be done, probably, should it be done, probably not. |
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#3 |
Not Yet Wild
![]() Join Date: Jul 2020
Location: Oklahoma
Posts: 23
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![]() Thanks for the reply. It makes we wonder more about the CDI swaps or gy6 swap since the g2 ignitors are crazy pricey
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#4 | |
Gone Wild
![]() Join Date: Jun 2011
Location: Northern Indiana
Posts: 2,827
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