dazza
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SuzukiSavage.com Rocks!
Posts: 5
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A newbie here, looking for advice on my thumper's troublesome carb-related issues. I recently bought a 2004, all-stock, good condition Savage. Basically, here's a story and I am open to feedback. I apologize for the level of detail, but would be stoked if anyone has the time to offer suggestions. The main issue is popping/cracking when shifting 1st to 2nd, sometimes 2nd to 3rd, plus residual knocking on deceleration. I cannot decide if more tuning is the trick, or the motorcycle chop-shop did not do the job I believe I paid them to do. I should add I have scoured the posts and seen all the stuff about carb rejetting, etc. Here's my Thumper story (ps: adore my thumper, issues notwithstanding!), with hopefully answerable questions following . . . FIRST trip to shop: jardine slash-cut slip-on + white spacer removed = gone is that darn duck-for-cover backfiring. More power! Still farts when shut off. But a new issue arose: a popping/cracking sound when shifting from 1st to 2nd and sometimes 2nd to 3rd (and apart from deceleration gurgles, she still knocks - sometimes quite loudly - in 2nd gear deceleration). SECOND trip (back) to shop: supposedly the carb was rejetted (to a 155 main, 55 pilot, and white spacer to half thickness), and slip-on given some sealant treatment where it joins the exhaust. I do not notice any difference. Still pops. Still knocks. Still farts when it's shut off. It's like its own roving concert. The idle speed screw is at a leisurely (normal) idle (it never stalls, starts fine). The low-speed mixture screw is currently 3.5 turns out. Below 1.5-2 turns out and some backfiring starts to return. It seems I have to have the low-speed mixture screw about 3.25 or more turns out to diminish popping (but the popping and knocking is still prominent). But it seems to 'surge' a little (hard to describe) at 3.25 turns out and more, plus it makes the bike weather sensitive it seems (flat spot at mid-1st and sometimes mid-2nd, though minor low-speed micture tweeks seem to remove that one). 1) Anyone suggest a next step? I'm concerned the no-change (still popping on way up, knocking on way down, like a bad pop song) after supposed carb rejet means I got a phantom carb rejet (no change in carb, just in visa bill). If my carb is those specs above (addressing 'too lean'), should I need the 3.5 turns out (richened that much)? Should I keep turning out?! Is this popping/knocking/farting just the nature of the beast? But it seems others on the forum have (mostly?) tamed those aspects of the beast? 2) There's also a rattle in the jardine slip-on (isolated it by trial and error removal of parts, etc). I maybe have to send it back as defective, unless someone can suggest a doable fix if it is a problem familiar to them? (ps: the jardine pipe is a bit anti-social but I now know what people mean when they say louder is safer).
Any feedback makes you a hero. thanks, d
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