Bad break-in, bad piston?

Awk08 said:

Nobody has ever proven the oil injection pump has failed, it does use a plastic gear but there's 20 year old blasters still using it.
what may fail is the operator not priming the pump as outlined in the manual after a rollover (I've had plenty of those back in the injection days and never primed it once) or after a prolonged sit with no oil, or a rebuild.

there's probably more of us who have eliminated it and mix though.

don't forget to block off the injection nipple on the carb, and possibly jump up one main jet size .... more oil = less fuel
plug chop to confirm

Click to expand...

Thank you awk. I have dumped a lot of money into this and just want a four wheeler to run for quite some time. While it’s completely all apart , continue to do everything now



Grabbed a block off kit. Will do this when it comes. Waiting on a few things anyways so it’ll be worth the wait.

Looking into tors removal now also while the bike is apart. One less thing to worry about.

As far as the jets, that’s another subject I’m sure I’ll be reading into once I get the motor back on. As far as I know, everything is currently stock. Thanks for the advice!

Tors removal:


Vito’s Tors eliminator kit:
https://rover.ebay.com/rover/0/0/0?mpre=https://www.ebay.com/ulk/itm/142220980020

This is just for my documentation on my blaster rebuild. Total cost of current project including parts, tools, and other things bought for f*ckery purposes.

$3.86 - Permatex 81950 Ultra Slick Engine Assembly Lube, 4 oz.
$11.40 - Yamaha 91800-05016-00 Pin, Dowel; New # 99530-12016-00 Made by Yamaha
$263.73 - Hot Rods CBK0041 Bottom End Kit (Bearings, Crank, Gaskets, Seals, Wrist pin)
$64.65 - Tusk Crank Puller/Installer Tool
$22.88 - Tusk Clutch Holding Tool
$12.30 - Three Bond Case Sealant Liquid Gasket
$16.27 - Pro Circuit Seal and O-Ring Grease PC-03
$5.69 - Pro Grade - Acid Brushes - 36 Count 3/8 Inch Boar Hair Acid Flux Brushes
$7.22 - Permatex 24300 Surface Insensitive Threadlocker Blue, 0.34 oz.
$22.99 - Vito's Stainless Steel Allen Head Bolt Kit Yamaha Blaster: Engine Case Ck200
$14.99 - Infrared Thermometer, Helect Non-Contact Digital Laser Infrared Thermometer Temperature Gun -58°F to 1022°F (-50°C to 550°C) with LCD Display
$11.55 - IRWIN VISE-GRIP Convertible Snap Pliers, 6-1/2-Inch (2078900)
$19.86 - VINCA DCLA-0605 Quality Electronic Digital Vernier Caliper Inch/Metric/Fractions Conversion 0-6 Inch/150 mm Stainless Steel Body Red/Black Extra Large
$7.99 - Motoparty Woodruff key Crankshaft piston For Yamaha Blaster
$7.36 - Sil-Bond RTV 6500 high temperature 1-Part industrial/construction grade silicone sealant
$21.99 - Carbhub YFS200 Carburetor Yamaha Blaster 200 Carburetor for Yamaha Blaster 200 YFS200 YFS 200 Carb 1988-2006
$13.32 - YFS200 Repair Carburetor Rebuild Kit for Yamaha Blaster
$7.55 - Caltric IGNITION COIL Fits YAMAHA BLASTER 200 YFS200 YFS-200 1997-2006 ATV
$16.95 - Outlaw Racing OR3630 Complete Full Engine Gasket Set Yamaha YFS200 Blaster 88-06 Kit
$26.76 - Boyesen 630 Power Reed
$10.79 - Flywheel Puller For ATV & Motocycle For Kawasaki/Suzuki/Yamaha 1968-2008
$54.99 - Vito's TORS REMOVAL ELIMINATOR KIT throttle cable + cap + idle screw BLASTER 200
$12.95 - Yamaha YFS200 Blaster oil injection block off plate kit YFS 200
$16.77 - Genuine YAMAHA BLASTER CLUTCH SPRING BOLTS & WASHERS (SET OF 5) 90119-05001-00
$148.61 - YAMAHA CLUTCH BASKET BLASTER 1988-2006 YFS200 88-06 YFS 200 3JM-16150-01-00
$31.08 - STATOR Fits YAMAHA BLASTER 200 YFS200 2003 2004 2005 2006 5VM-85560-00-00
$19.99 - New 88-06 Yamaha Blaster YFS200 Cylinder Head Stud And Nut Kit 90116-08394-00
$232 - Ken O'conner Racing (Honed cylinder, provided piston, piston rings, includes shipping, as well as a few other parts)
-------------------------------------------------------------------------------------------

Total: $1106.49

https://www.blasterforum.com/threads/03-06-tors-removal-diy.41973/

For tomorrow

So close.

15+ min at 6psi. Woot

Just need to remove all unwanted wiring and tie together black/yellow-black wire together in front by light.

Then, install engine. Woot

Well, I used this page for a lot of my own documentation and questions. Thanks everyone for helping given the name of the thread. I now having a completely rebuilt engine in my blaster. Was offered $400 for it and ripped the motor out the next day and started my first small engine rebuild. This forum and the people on here definitely helped out and also Ken Oconner's videos. Was awesome, started second kick. Lots of trial and errors, but this damn thing sounds great.

New crank, bearings, seals, gaskets, piston, honed/bored cylinder, tors delete kit, clutch basket, clutch plates, oil injection block off, reeds, stator and so much more.

Sealed up tight didn't lose any PSI on leak down test. I'm just happy as all fawk.

Thank you again!

ps. I'm sure i'll have a sh*t load more questions. ty