Jim Moore 2000 Yamaha FZS600 Fazer

Fusty Fazer emerges from long lay-up with fu­elling dif­fi­cul­ties. Yes, re­ally

Practical Sportsbikes (UK) - - News -

ALAN’S GEN­EROS­ITY knows no bounds. He didn’t even flinch when I asked if I could bor­row his Fazer of an evening to see my bet­ter half, Kelly, who lives 50 miles away. In fact he in­sisted, keen as he was to get a cou­ple of fresh tanks of un­leaded through the FZS in an at­tempt to cleanse the fuel sys­tem and ad­dress the bike’s low rpm run­ning is­sues.

Al ul­tra­son­i­cally cleaned the carbs as part of the bike’s recom­mis­sion­ing ser­vice back in Jan­uary. The bike had stood for 10 years and un­sur­pris­ingly the Mikuni 38BDSRS were clogged solid with old fuel and de­bris. But even the ef­forts of the ul­tra­sonic clean­ing weren’t enough to re­store the FZS’S car­bu­ra­tion to its pre lay-up fi­nesse.

Be­fore re­sort­ing to the has­sle of re­mov­ing and clean­ing the carbs again our man See­ley thought he’d try an­other less in­va­sive pro­ce­dure to spruce up the Fazer’s run­ning. Fuel­tone Pro is an ad­di­tive de­signed specif­i­cally to flush mo­tor­cy­cle fuel sys­tems; our friend’s at Speedy­com, spe­cial­ists in per­for­mance parts for mainly Ital­ian ma­chin­ery, asked us to try the stuff be­cause they’re think­ing about mar­ket­ing it (if it’s any good).

The ad­di­tive comes in 45ml bot­tles – one per tank­ful. As well as claim­ing to clean de­bris from fuel lines and carbs, Fuel­tone also say it en­cour­ages a more com­plete burn and there­fore re­duces emis­sions, even in­creas­ing oc­tane lev­els for en­hanced per­for­mance and im­proved mpg. Those are big claims and, to tell the truth, we’re al­ways scep­ti­cal of such bold as­ser­tions.

The Fazer’s low-rpm run­ning is in­deed an an­noy­ance. Be­low 4000rpm the mo­tor strug­gles to pull cleanly, stut­ter­ing its way off the lower reaches of its torque curve. Junc­tions and get­aways from the lights re­quire an em­bar­rass­ingly gen­er­ous amount of throt­tle and clutch slip just to avoid bog­ging down and ap­pear­ing to be an even big­ger tit. Idling is strug­gle too. I found my­self con­stantly twid­dling the idle screw to pre­vent the thing stalling.

On the move the Yamaha is a dif­fer­ent story. It’s a blast. I have fond mem­o­ries of the Fazer’s launch in Si­cily way back in 1998. De­spite its cud­dly styling the FZS is no less a hooli­gan than it was back then. A bud­get all rounder it may be, but it’s also a laugh from the minute you prod the starter to the mo­ment you stop. Al’s fit­ted fresh Avon 3D rub­ber – Storm front and Ul­tra rear. They re­ally suit the Fazer and its ten­dency to en­cour­age ’peg-scrap­ing lean

“Gen­er­ous amounts of throt­tle and clutch slip just to avoid bog­ging down and ap­pear­ing to be an even big­ger tit”

an­gles and last minute heart-in-mouth brak­ing. Those blue-spot calipers may be 17 years old and count­ing, but they’re still sharp enough to cut it.

Un­able to re­sist my bet­ter half’s cook­ing (who can say no to mush­room Stroganoff?), I’ve emp­tied sev­eral tanks of un­leaded on Al’s Yamaha al­ready. I’ve no­ticed no im­prove­ment in per­for­mance or fuel econ­omy but bit by bit the car­bu­ra­tion is get­ting bet­ter. It’s still not per­fect but I reckon a cou­ple more tanks-worth might just do it. Two more mush­room Stroganoffs it is then…

Good tech­nique on the noz­zle Jim It’s a po­tion al­right, but is it magic?

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