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07-23-2009, 07:19 AM
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#16 (permalink) |
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:::Official Spammer:::
 
Join Date: Mar 2006
Posts: 3,036
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cant speek to the yfz thumber but if you put the spring in the carb the pull is all most cut in half
go on ebay you should find it under yfz450
__________________
03 ltz400,95.5bore,+5crank,P&P,13.7:1,JE piston,spacer plate,RHC +1 intakes valves,RHC #208in&187ex cams,DRZ manual decomp,DID cam chain,no air box,Sredrum TB 42mm FCR,RAT stack,WB fuel screw,EMN needle,quick shot,06 clutch 450r drive plates w/trx400 ex springs,C2HB,ex thumber,trx450r air boot, Barker Performance pipe, trailteck flywheel,dynatek,nerf bars,450r shocks, nerf bars,+4 swinger,lowered front & rear |
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08-22-2010, 03:00 PM
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#18 (permalink) | |
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:::Official Spammer:::
Join Date: Mar 2006
Posts: 3,036
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Quote:
__________________
03 ltz400,95.5bore,+5crank,P&P,13.7:1,JE piston,spacer plate,RHC +1 intakes valves,RHC #208in&187ex cams,DRZ manual decomp,DID cam chain,no air box,Sredrum TB 42mm FCR,RAT stack,WB fuel screw,EMN needle,quick shot,06 clutch 450r drive plates w/trx400 ex springs,C2HB,ex thumber,trx450r air boot, Barker Performance pipe, trailteck flywheel,dynatek,nerf bars,450r shocks, nerf bars,+4 swinger,lowered front & rear |
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08-22-2010, 10:55 PM
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#19 (permalink) | |
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Super Moderator
 
Join Date: Sep 2006
Location: Southern Minnesota
Posts: 6,432
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Quote:
When you hook a FCR carb to the stock Z thumber the pull is very stiff, to the point that your thumb will get sore after a short ride.
__________________
03 LT-Z 470 Max Power 12.5:1 94mm Piston, Hot Rods +5 Stroker Crank, Web Cams 539 (+6) IN / 539 EX, with Hot Cams sprockets, Ferrea +1 Valves, LTZ/DRZ springs (IN)DRZ springs (EX), DRZ Manual Decomp. Ported head, FCR 41 with Noss adaptor, Home made intake, Modified HMF Full System, Home made header, Trailtech flywheel, Dyna Programable 54hp 36ft lbs
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08-23-2010, 04:49 AM
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#20 (permalink) | |
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:::Official Spammer:::
Join Date: Mar 2006
Posts: 3,036
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Quote:
the other is to drill a small hole and hook the spring into it which take some of the winding out of the spring 
__________________
03 ltz400,95.5bore,+5crank,P&P,13.7:1,JE piston,spacer plate,RHC +1 intakes valves,RHC #208in&187ex cams,DRZ manual decomp,DID cam chain,no air box,Sredrum TB 42mm FCR,RAT stack,WB fuel screw,EMN needle,quick shot,06 clutch 450r drive plates w/trx400 ex springs,C2HB,ex thumber,trx450r air boot, Barker Performance pipe, trailteck flywheel,dynatek,nerf bars,450r shocks, nerf bars,+4 swinger,lowered front & rear |
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08-23-2010, 08:03 PM
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#21 (permalink) |
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Super Moderator
Join Date: Sep 2006
Location: Southern Minnesota
Posts: 6,432
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I modded my Z thumber to give my thumb more leverage, but I dont have any pics. I wouldnt recomend it to most people though. It was not real easy to get it all right. Basically I shortened the arm that hooks to the cable in the thumber a bit, but you have to be careful because if you go too far you will bind the cable, and I had to change its shape a bit to allow farther motion.
__________________
03 LT-Z 470 Max Power 12.5:1 94mm Piston, Hot Rods +5 Stroker Crank, Web Cams 539 (+6) IN / 539 EX, with Hot Cams sprockets, Ferrea +1 Valves, LTZ/DRZ springs (IN)DRZ springs (EX), DRZ Manual Decomp. Ported head, FCR 41 with Noss adaptor, Home made intake, Modified HMF Full System, Home made header, Trailtech flywheel, Dyna Programable 54hp 36ft lbs
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