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1*Voltage Regulator
Fit
Honda TRX 300 Fourtrax -- 1988-1993
Honda TRX 300 FW Fourtrax -- 1988, 1990-1993
Replace
OEM Number 30410-HC4-770
30410-HC4-003
30410-HC5-970
30410-HC5-971
9900-5127 10027
Performance
Help the car eliminate clutter interference, stabilize the output voltage
improve the instantaneous discharge capacity of the power system
increase the torque output
Tips
Please check with us if not sure about your replace number
If you have any questions we will be pleased to assist you
Kevin j.
2025-08-12 14:04:51
tried other option on amazon that was blue and it did not work, making me think there was something else wrong. bought this one and started right up.
Harv Harrison
2025-05-14 11:09:38
This is the second I bought…. It was the cheaper one… works perfect
Ignernt Idjut
2025-04-29 15:47:42
My 1988 TRX300 wouldn't start, no spark. The CDI was already changed a couple years ago and apparently failed again.With this CDI in the system, the coil made a fat healthy blue spark that jumped over . 25 inch or 7+mm with a solid audible POP. Before, nothing.It definitely fixed the no-spark problem and the machine starts and runs great now.Testing: Rumor has it you can troubleshoot the old CDI by baking it at 250-300F in an oven for 10-15 minutes. If it works hot but fails as it cools down, the issue is a bad CDI. Nothing changed with my old CDI when I tried this test, but allegedly this technique has pinpointed the problem for lots of other people on the interwebz.
L Holman
2025-04-11 16:03:08
Was a plug and play fix at a decent price.
Peggy C
2025-04-04 18:18:10
Didn't work, priced right, I thought.
Customer
2025-04-01 10:18:21
Perfect fit for my 88 Honda Fourtrax. Delivered in 2 days, and the machine fired right up!
edstanjr
2025-03-03 15:38:55
Installed easily. Started up in first try. Working great!
Customer
2024-12-04 15:56:51
These are known to fail in these old atv. To test yours just take it off and bake it in the oven. Then reinstall and the atv will likely run. It will fail again eventually but at least you will know that the cdi is the problem.
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