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Delkevic 1TX 84-88 Slip On 13.5″ X-Oval Stainless Exhaust

Started by 5speed, July 20, 2024, 01:43:19 PM

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5speed

Anyone running these slip ons?
According to their web site you don't need to rejet your carbs using these but mine is snapping and crackling when I let off the throttle.
Not outrageously loud but it's there.
the sound is growing on me.
It sounds like  Dean Harrison's ducati super bike.  :good:
1986 FJ1200
2000 Roadstar
1976 GL1000
1978 GL1000
1982 GL1100 (sold)

Pat Conlon

There is an ignition advance that happens upon closed throttle. This spike in timing flash burns off any unburned hydrocarbons left over in the cylinder from the open throttle conditions. This is a US EPA smog feature, not all FJ models have this vacuum advance. If you do (look for a vacuum line to your ignition box) try disconnecting this vacuum line, remembering to plug off the source vacuum from the intake port.
Capping off this advance function will not affect performance. Again, this advance action only happens at closed throttle.
For more reading: https://fjowners.com/index.php?topic=11690.0

It's simple to do, totally reversible. Try it out.

Please report back to see if your snap, crackle and pop goes away. I'm curious if this will fix this.

Cheers
1) Free Owners Manual download: https://tinyurl.com/fmsz7hk9
2) Don't store your FJ with E10 fuel https://tinyurl.com/3cjrfct5
3) Replace your old stock rubber brake lines.
4) Important items for the '84-87 FJ's:
Safety wire: https://tinyurl.com/99zp8ufh
Fuel line: https://tinyurl.com/bdff9bf3

5speed

1986 FJ1200
2000 Roadstar
1976 GL1000
1978 GL1000
1982 GL1100 (sold)