Cylinder Head Pocket Porting & Valve Lapping : Yamaha TMAX Major Service Part 5 : Motorcycle Scooter

In this video series, I'll be replacing the fuel pump assembly and doing routine maintenance to my 2011 Yamaha TMAX 500. The service manual recommends a major service every 12,000 miles and a valve clearance check at 26,600 miles. My TMAX is at almost 28,000 miles, and the last major service was at 12,000 miles, so it's time to dig in.
In part 5, I'm porting the TMAX's cylinder head! A little bit of work and a very small amount of expense may allow me to pick up some extra power through the process of primarily pocket porting or bowl blending. A little bit of port matching is done as well and smoothing casting flaws. The valves are lapped and the reinstalled so the head is ready for use.
If you own a TMAX and are considering doing your own service, or are thinking about getting a TMAX, I hope the TMAX service series will help you get an idea of what it's like to do the 12,000 mile service, due at 12,000, 24,000, 36,000 and so on. This particular video is less about service and more about performance and may be helpful for motorcycles, smaller scooters and even autos.
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Tip Jar ( PayPal) : paypal.me/49ccscoot
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Products And Tools (affiliate links)
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Foredom SR w/foot control :
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Foredom H.28 handpiece :
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Foredom inner flex shaft
(These can break if it catches. Keep a spare IMO.) :
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Router speed controller :
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1/8" shank single cut carbide burr set :
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1/8" shank double cut carbide burr set :
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Dremel drum sanding mandrels :
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Dremel 60 grit sanding drums :
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Dremel 120 grit sanding drums :
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Clip-on headlamp :
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Safety glasses :
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Dust masks :
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Valve lapping tool :
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Valve grinding compound :
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Heavy duty valve spring compressor :
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Budget valve spring compressor :
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Please Like the video and Subscribe for more if you enjoy it or think it's helpful. If the video could help someone you know, share it with them. Don't forget to click the bell to receive notifications if you haven't already. Thank you for watching.
My Yamaha TMAX 500 Playlist :
• TMAX Videos
Use any information, suggestions, techniques and links provided at your own risk.
0:00 Intro
0:28 Basic Porting Info & Goals
6:44 Tools & Supplies
11:13 Intake Cleanup & Port Matching
12:54 Blending & Smoothing The Intake Port Entrance
20:06 Exhaust Port Exit Casting Flaw Cleanup
20:51 Marking And Protecting Valve Seats
30:24 Intake Port Bowl Blending
37:52 Exhaust Pocket Porting
40:44 Valve Lapping
48:01 Installing Valve Seals
49:49 Installing The Valves
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Songs & Sounds provided from the TH-cam Audio Library. (In order of appearance.)
- Dumpster Door Hit
- Sun Spots by Silent Partner (Intro)
- River City by DJ Williams
- Modern Time by An Jone
#CylinderHead #BowlBlending #PocketPorting