Burned down middle piston for the 2nd time

M

MaximaFan

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Apr 6, 2004
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I think it is the Tempa flow attached that is leaning out my middle cylinder. Lucky this time I was going slow and it didnt damge cylinder so cheap fix. Has anyone had this happen due to an incorrectly attached tempa flow I Am 99.9% sure it is not installed correctly I will not drive the 2000 SRX 7 until I know this is fixed.
Thanks,
JT
 

Tempaflow leans out all holes the same amount. Do you have your baseline jetting at -20F? Where do you have the body located, and where is the large tube drawing its air from? Are all the vent lines T'd correctly to the tempaflow body? Any pinched lines anywhere?
 
my buddy cooked middle piston on his 2000 srx 700 this weekend the funny thing is it ran great last weekend over 200 miles he picked it up a few weeks ago dont know any history behind it but he did go thrue the carbs before he rode it and thay where perfect this weekend it only went about two miles but he was braken a trail when he stoped and said he poped a plug i checked it and said no you poped a piston engine seemed realy hot to he said he dident see a temp lite? going to take it apart tonight or tomarrow
 
Could be water in the fuel. Check the good cylinder plugs and see if there are white nonmetalic spots on the plug base. They wipe right off. One sign of water vapor.
 
2000 srx,s were lean. They would go down after a few miles & It takes a long time to happen. Jet em to at least 01 specs. With a tempaflow you gotta jet way up.
 
just getting back to you guys, just pulled head the piston is burnt pretty good on ex side and scored all the way oround, it gets worse this isint the first time head is beat up bad like it broke a ring last time and can see sanding scraches in the dome,THIS IS DEFENLETY A BACK TO BACK TWO TIME LOSER!!!!!
 
Exhaust side is lean. Lose the tempaflow & jet it up 2 sizes straight across.
 
what jetting do you have in that thing? stock 2000? If so do as Turk said and jet it up two sizes on all holes.
 
With a tempaflow, why not jet the hell out of it and then lean back a little with the adjustments on that unit? ie jet to -40 or lower then work your way back.
 
I cooked my top end twice on my 700 SX with the tempa. Jettted the mains way rich but I only went up one size with the pilot jets. This is where the problem was, after going up another size in the pilots and adjusting the needles the mid range fattened rite up. Rnuuing nice and cool now and still have the flexability of adjusting the tempa flo.
 
Personally i have had great luck with the tempaflow, but you have to set it up right first. It's just another tool to having a finely tuned sled.
 
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