shortening 4,200 spring

[gorilla550]

I keep reading that the 4,200 springs are longer than the stock spring, so what would be a good way to shorten it up so I don't have to go through the trouble of re-indexing throttle arms.

 

[Bruiser09ram]

That's a terrible idea, either re-index or go with a different spring.

 

[oldestof11]

I cut 1.5 coils off and bent .5 coil to gain the hook back.

I shoved a screwdriver between the coils and twisted the spring until I separated the ones I was cutting off from what I was keeping. I then used wire cutters to cut it off. I think I used the needle nose and a pair of linesman pliers to bend it.

 

[BC847]

I cut 1.5 coils off and bent .5 coil to gain the hook back.

I shoved a screwdriver between the coils and twisted the spring until I separated the ones I was cutting off from what I was keeping. I then used wire cutters to cut it off. I think I used the needle nose and a pair of linesman pliers to bend it.

This. $.02

The thing with reindexing the longer spring is the fact you'll actually loose a little throttle stroke (internally).

 

[diesel_importer]

Is the "374" spring a 4200?


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[BC847]

Unless I'm mistaken . . . .

2800 RPM 1-464-650-386
3200 RPM 1-464-650-366
3800 RPM 1-464-650-374
4200 RPM 1-464-650-354

I personally run the 3800 spring. Works well.

 

[diesel_importer]

Ok, thanks! I ended up with 4 of the 374's when I wanted 2 of those and 2x 366


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