smallfry Posted October 3, 2005 Report Posted October 3, 2005 (edited) Guys...I need your help again........ Does anyone know what the piston to wall clearance is on Wiseco forged alluminum pistons? Had a pop noise comming from the bottom end...Sounded like a piston slap. Can't find specs anywhere....H E L P ..... THE MODS: 1. NOSS Head 2. 21cc domes 3. Wiseco Forged Alluminum Log rod Pistons 0.050mm 4. 4mm stroker crank 5. 5mm Rods 6. Race Logic stage 3 porting 7. V-Force 3 reeds 8. Keihin PJ 34mm Carbs 9. No box lid 10. TORS is gone 11. Toomey T-5 exhaust 12. Ricky Stator timing plate 13. Compression check is 150 psi on both sides 14. I live at 2200 ft ASL. 15. New K&N Air filters with new outerwears 16. New BOSS Intake from Inland ATV. 17. Twist throttle Edited October 4, 2005 by smallfry Quote
Shee-Male Posted October 4, 2005 Report Posted October 4, 2005 check weiscos site, or your spec sheet that came with the pistons, you should be about 3-4 thou. piston slap usually rattles for a bit then goes away after warm up, If its a "pop" its prooly not piston slap. Quote
Shee-Male Posted October 4, 2005 Report Posted October 4, 2005 do you mean 50 as in 1/2 a mm (=.020) or .050?, remember the pistons and engine are metric and the box will be labled in mm. Quote
smallfry Posted October 4, 2005 Author Report Posted October 4, 2005 (edited) This is my luck guys... Never a dull moment...Just got back from Dumont Saturday, while riding heard a slight pop coming from the bottom end, left side. As the day progressed, so did the pop, however, only made the noise at idle. Sounded like a piston slap. Pulled the motor to see if it was hurt, nope! No damage..... BUT....wanted to check the wall clearance to rule out that option out, but as my luck has it, NO Fuggin' paperwork...as usual.... Tried to call Wiseco this morning/afternoon---NOT OPEN TODAY! Tried Wiseco's website....NO INFO...as usual.... The pistons are Wiseco forged Alluminum long rod bore 0.050mm part #316-0393. Sorry if there was some type of confusion. "Meanwhile at Dumont...The shee ripped 4 Brand new paddles down the middle" Didn't really want to get into it's full potential with that pop coming from the bottom end.... Edited October 4, 2005 by smallfry Quote
seb4lo Posted October 4, 2005 Report Posted October 4, 2005 (edited) 3. Wiseco Forged Alluminum Log rod Pistons 0.050mm You'll size at the first WOT !! 0.065 - 0.075 mm ! Edited October 5, 2005 by seb4lo Quote
smallfry Posted October 4, 2005 Author Report Posted October 4, 2005 RBD... Thanks for the info.... 0.003 thousandths... I really do appreciate the help Just spoke to Wiseco..They will be e-mailing me the spec's that where supposed to be in the box from the beginning...I asked for the clearance and they stated it exactly what you responsed with...Thanks I really do appreciate the honesty! Quote
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