YAMAHA ATV BIG BORE KITS

		ATV Kit LINKS Big Bore Kits Introduction Honda Big Bore Kits Yamaha Big Bore Kits

Yamaha Blaster Kit

YFS Blaster 240 Kits --- thru 2004
Stage three:£435.00 Kit includes new big bore sleeve installed and match ported, cylinder porting, Xtreme Piston kit, Top End Gaskets and Head modification.

NEW YFZ 450 Big Bore kits

YFZ 450cc legal overbore kit for 450 class-True 449cc kit

YFZ 450CC - True 449cc BORE KIT 2004 (Bore 96mm) 13:1 Compression.
Stage one:£335.00 uncoated piston and top end gasket kit.
Stage two: £385.00Xtreme piston top end gasket kit.
Stage three: £500.00 Head porting, with Xtreme piston and top end gasket kit.

YFZ 480CC - YFZ 450 to 480cc BIG BORE KIT 2004 (Bore 99mm) 12.5:1 Compression.
Stage one:£335.00 Uncoated piston and top end gasket kit.
Stage two: £385.00 Xtreme piston top end gasket kit.
Stage three: £500.00 Head porting, with Xtreme piston and top end gasket kit.

		YFZ 480CC YFZ 480CC - YFZ 450 to 480cc BIG BORE KIT 2004 (Bore 99mm) 12.5:1 Compression. Stage one: £335.00 Uncoated piston and top end gasket kit. Stage two: £385.00 Xtreme piston top end gasket kit. Stage three: £500.00 Head porting, with Xtreme piston and top end gasket kit. Dyno Opposite (Torque & Power) ---- Blue=Stock Red=Aptec Motorsport

	You want it, we've got it!  The 508cc YFZ Dad Dog DD05 Stroker package is finally here!!  Bolt-on kits in stock ready for immediate shipping  >>>>more

660 Raptor Kits

YFM 690CC - BIG BORE KIT 2001-2004 (Bore 102mm) 11:1 Compression.
Stage one:£335.00 uncoated piston and top end gasket kit.
Stage two: £385.00Xtreme piston top end gasket kit
Stage three: £500.00 Head porting, with Xtreme piston and top end gasket kit

660 Grizzly Kits

YFM 690CC - BIG BORE KIT 2001-2004 (Bore 102mm) 11:1 Compression
Stage one:£335.00 uncoated piston and top end gasket kit.
Stage two: £385.00Xtreme piston top end gasket kit.
Stage three: £500.00 Head porting, with Xtreme piston and top end gasket kit.

This is the procedure for packaging and shipping your engine parts for mail-order service;

1.	Find a strong cardboard box. Select a box that allows 4 inches of space around the engine part.
2.	For cylinder plating repair, please remove all spare parts.  We only need a bare cylinder.
3.	The best packing material is 'bubble wrap'.  Take care to pack around the fragile parts of engine parts like the bottom skirt of the cylinder, the head's water fittings, or the crankshaft's threaded ends.
4.	Enclose ORDER FORM. Print a Service/Repair or Big Bore Kit order form from your browser.
5.	Regarding payment, you can pre-pay with a personal check or visa card. You can also have your parts returned shipped by pay prior to despatch by Visa/Mastercard.
6.	Its best to send your parts by business post. Remember to insure your parts for at least £300 and get the tracking number. (This costs approx £3.60 per £1000.00 from Post Ofice). If there is any problem, you can track your package.
7.	Send engine parts to: APTEC Ltd, Southbrook Road, Gloucester, GL4 3DN.
8.	If you require insurance on return, please advise us when placing an order.