SV feels rough, when rolling off the throttle

[Blapper]

Originally Posted by R1ffR4ff

I cannot tell you how many times I've helped people fix a really nasty and niggling troubleshooting by just buying some new and decent Spark Plug caps.They can cause all sorts of unearthly problems.

What do you mean by new and decent? OEM or do you have another source for SV caps?

[R1ffR4ff]

Originally Posted by Blapper

What do you mean by new and decent? OEM or do you have another source for SV caps?

As I'm new to the SVs I don't have a tested source for the plug caps yet but I've used Wemoto for many parts over the years and had no problem with their parts and would buy from them for my 1999

http://www.wemoto.com/bikes/suzuki/sv_650_sx/99/

even if they don't list them they are usually helpful just like David Silvers or John Oldfield(Mega knowledgeable guy),

http://www.johnoldfield.co.uk/


I don't think it matters if they are OEM or another Brand so long as they are from a trusted supplier.

I don't know these people but I've always trusted NGK anyway,

https://www.motorcycleproducts.co.uk...-p-297130.html

Thanks for some of the feedback guys. It just seems strange, the bike hasn't lost any power, it's fine riding, when you roll off the throttle and it's just when you get below 5K revs it starts to make a slightly louder and deeper noise (from the engine presumably) and I receive vibration feedback.

I've had a look through the forums and just can't find anything similar.

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[maviczap]

Originally Posted by tom_e

Worn chain and sprockets? Wheel bearings?

A badly worn chain with lots of seized links (back when I knew no better) made my old 125 feel very rough and clunky when rolling off the throttle so I'd probably check there first.

A bit left field, but worn cush drive rubbers? Only happens when you roll off the throttle?

The issue is only happening when there's no acceleration, the bike reaches 5K revs and then the issue arises.

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[R1ffR4ff]

I've just been looking at spark plug caps for my 1999 SV650 and they have a 5ohm resistor in them so that should be the around the reading if you test them.I don't know for other years?

It's worth testing them to eliminate them from the troubleshooting.

[Crawling Finn]

One easy but worthy test would be to check whether you have any air leaks around throttle bodies. I use Start Pilote to spray on the throttle bodies and rubbers outside and if the revs go up you know you have a leak. WD40 might work as well if you are worried about volatility of the Start Pilote.