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lots of backfire and hard shifting.

2925 Views 8 Replies 5 Participants Last post by  dan330

I have a 1994 Intruder 1400. It has Cobra straight pipes and jets which were put on by last owner. It sounds great and pull very strong and gets about 45 mpg.

But it pops or backfires a lot. Not sure which Pops or backfires: What is the difference? How can you tell by the sound?
This happens mostly as I slow down. In top gear (4th), it happens a lot when I slow form high speeds (70 mph) but will do it at other times too.

Not sure if this is normal for a bike with these mods. It does sound like are a Harley. 8)

The other thing is the shifting. It is very loud. Just seams like it might be hurting some cogs. It is more so into 2nd and 1st from higher mphs. I am not engaging the clutch, just shifting to find what gear I am in.

Oh, 1 more question...
The rear shocks needs to be adjusted. The last owner must have them on very stiff. It is very hard over bumps and jars my jaw!
Which direction do I twist the adjusters on the shocks?
Do the twist in different directions? Left and right shocks?
How many levels of adjustments are there?

Thanks everyone in advance... :D :D :D
1 - 2 of 9 Posts
i'm just gonna attack the backfiring. with the mods the previous owner put on, you're running rich. sooo, what you need to do is get your EFI adjusted to the new mods. so either find an existing fuel map and take it to the dealer and tell them to adjust it for you, or pay for a dyno fuel mapping and get it custom adjusted. the choice is yours. good luck.

i'm gonna take a few guesses at the other problems, maybe when your shifting, your at a higher rpm ( b/c your just checking for the correct gear) which doesnt give the synchros enough time to do their job thus making it a tough fit. so i dont think its actually doing any damage, but i'm not a tranny expert. and as for the suspension...guess and check?
opps, my mistake. i just assumed it was a fuel injected bike. but either way he was still running too rich.
1 - 2 of 9 Posts
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