HEWTECH
ELECTRONICS LLC
CDIBOX.COM
VINTAGE
SNOWMOBILE CDI BOX'S![]()
FIREPLUG CDI FOR YAMAHA TWIN ![]()

APPLICATIONS:
74~76
YAMAHA GPX & THUNDER-JET SX338/433
76 SRX & 76~77 EXCITER
replaces:
Priced at $155.00 (US-funds)
(FREE shipping in the US & Canada)
Compatible Bullet-type connectors are used.
Contact us for shipping address by e-mail or telephone (both listed below)
DESIGN BACKGROUND: The FIREPLUG CDI is a high-performance replacement ignition unit for your Vintage Yamaha. Other improvements from the original Hitachi CDI is the elimination of the rev-limiter, which the Hitachi CDI utilized to stop over-revving. This was a huge disadvantage for modified engines, as the maximum RPM was limited by the CDI box. The FIREPLUG allows the engine builder to determine the RPM range. The FIREPLUG CDI provides a higher-energy output. This translates to quicker starting, quicker throttle response, stronger pull & cleaner burning combustion.
The FIREPLUG is manufactured using the best available industrial-grade components. The FIREPLUG is not a high-volume / mass-produced imported device. It doesn't exist until an order is received. Ask anybody currently running our FIREPLUG CDI ignition unit.
There is not a better CDI available...period!
DYNO-PERFORMANCE: Kurt Andrews did some DYNO testing on a stock 440SX Thunder-Jet engine. Kurt started with the stock Hitachi CDI, then tested again using the FIREPLUG CDI. The DYNO measured 2~3 horse-power gain in the mid-range with the FIREPLUG CDI installed on a STOCK engine. The DYNO doesn't lie. This was obvious with the quicker throttle response, stronger mid-pull, easier starting. All this and hotter spark by only changing to the FIREPLUG CDI.
PAYMENT OPTIONS: See main page at http://www.cdibox.com
Please Verify ALL items & amounts with us by e-mail, prior
to purchasing.
Contact us by E-mail anytime with questions
Phone: (810) 765-0820 (EST) (available most evenings)
This page last updated 11/06/04