Seafoam is the only cleaner I bother with.  I've used it to soak things and watch deposits dissolve as well as running it through.

There's a guy on youtube that tested a whole lineup of fuel system cleaners: techron, STP, lucas, seafoam, etc.  He used different cars for each one, borescoping the top of the cylinder through the spark plug hole for a before and after comparison.  Granted, it isn't looking at the valves or injectors, but it's something.  Seafoam was the ONLY one in the lineup that made any appreciable difference in carbon buildup.

Just my $0.02, YMMV.

I use a little seafoam (like capful) in my 2 cycle engines (trimmer, chainsaw) each year with the first tank.  I can see the difference (i.e. chainsaw not running good, add a little sea-foam, it starts working better within a few minutes.  

I have used a little in the lawn mowers too, I think it helps.  


Neilap, I think you may be right.  My experience is that weather, humidity, pressure, etc. make a big difference in how the bike runs.  

(not that anybody asked....)
Another snakeoil that worked better than I expected was LUCAS power steering leak stopper.  About the begining of May,  I found the PS fluid in my Honda Odyssey van was low...added a bottle of NAPA PS fluid, 2 days later empty again,  seemed to be leaking out of the steering rack somewhere.  With 235,000 miles on an '02 I'm not about to spend a thousand or so on getting that fixed, so I figured what the heck.  Put a bottle of LUCAS in, and whaddaya know!  Reservoir is still full.  

JOG he said the rack is leaking, not the pump
I'd DIY, as a rack still isn't a big deal on most cars, but I used to do dat shtuff for a living

Looks like you have to lift up the engine a little with a hoist, remove the engine mounts and drop the sub frame....YUCK!

The worst part is that I'm the guy who watches few youtube videos and says "oh yeah, I can do that"  - generally I get it done eventually, but always end up wishing I'd just payed to get it done.  I'm lucky enough to have a local independent shop that does good work for reasonable prices.  I just hate to put any multiple hundred dollar work into a car that could die of any number of things at any time, so i try to DIY it on the cheap ... (I spend a little time on the odyssey club forum too)

There's such controversy over sea foam etc if it works for ya be all means use it!

Serowbot wrote on 06/05/15 at 17:46:26:


I shift into 4th at 47-50.  4th for me starts to get sluggish below that.  I'll shift into 5th around 62-65.

There's a shift points thread that Neilap might be interested in here http://suzukisavage.com/cgi-bin/YaBB.pl?num=1378653517/6