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post #1 of 10 Old 12-27-2016, 06:42 PM Thread Starter
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Blue smoke

I just took a 2008 in on trade, but know nothing about it's past. Bike runs good, has plenty of power, but smokes blue a lot when cold and every time you crack it when hot. Not mosquito killing smoke, but you can see it if you look. I checked compression and have 60 psi cold, and 65 psi hot. Anything else to look for? I like the bike, but not sure if I want to keep it if smokes.
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post #2 of 10 Old 12-28-2016, 12:12 PM
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i'd say its a great time to add more CC's

751 ,barker pipe,290 Web cam,+3 stroker,TB bored to 46.8 and moved back from head 1 inch,+3 big bore , +1 intake valves, Hard Welded Rockers,KW springs, ported, clutch mod , air box removed ,Cat oil mod, dynojet commander V w/auto tune , lowered rear end , TRX450R front shocks ,
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post #3 of 10 Old 12-29-2016, 01:20 PM

 
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Dbl chk stuff like oil in the air box, or over oiled air filter. But like cataway said, it's probably time for a new piston and ring set. Not to hard to change depending on your mechanical skills. hardest part is removing all the bs to get to motor. You have to remove plastic's and tank, ect...

#1 2008 Honda Trx700xx HMF Performance Exhaust, PCV, Stroked 710cc, 10.5:1 Wiseco Piston, Frt Elka Stage 4's, Fox Podium X rear's, EHS Lid, L8ton 11/16" sway bar, DG 6 Pack Rack, PRM Desert II Bumper & Front Skids.
#2 2008 Trx700xx AMR Reaper, Ehs Big 3, P/P head, Xcalibur Cam, Hard Welded Rockers, +1 In/Ex Valves, +3 Throttle body, 11:1 CP Piston, Elka Stage 3 Legacy Shocks, L8ton 11/16th Sway Bar, PRM Front Skids, Desert II Bumper & Rear Utility Rack.


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post #4 of 10 Old 12-30-2016, 09:52 PM Thread Starter
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So do these engines wear out quickly? Or bad design? Being EFI and having a rev limit, it shouldn't be to easy to screw it up. I don't want to put a lot of money into it, just want to ride. I am able to rebuild, just no time or shop space at this time.
Where is a good place to look for rebuild kits?
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post #5 of 10 Old 12-31-2016, 12:29 PM

 
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The slipper piston design isn't necessarily a good idea in a high revving engine. I think my motor lasted 4 years before the grenade affect. What happens in a lot of cases is the piston skirts crack. 1st with tiny hairline cracks that will cause very little smoke, but residue in the exhaust pipe will be noticeable. And whens the cracks get worse and the skirt finally breaks loose, theirs nothing to hold the rest of piston in place. So there goes your jug! I also noticed a decrease in power in mine like 3-4 rides before it blew. I thought it was something else like just handling better with all the upgrades I did, because I was using higher gears in places I never did before. The quad was still extremely fast, just laying down some in the higher part of each gear. I'm thinking about taking mine apart again before next session. Especially since I've been sitting on a big bore kit for about 2 years. I to have a limit on space to work, as I have a 2.5 car garage with 5 quads, 1 car and tons of crap in it, but its a toasty 69 degrees!

As far as a good place for rebuild kits. That depends on your budget of coarse. If low budget, look on eBay for a wiseco piston. And get one 103 or 104. factory is 102. Also order a top end gasket kit. You will have around $200 in this. When you get the piston, take it and the jug to you local machine shop to bore it out.

#1 2008 Honda Trx700xx HMF Performance Exhaust, PCV, Stroked 710cc, 10.5:1 Wiseco Piston, Frt Elka Stage 4's, Fox Podium X rear's, EHS Lid, L8ton 11/16" sway bar, DG 6 Pack Rack, PRM Desert II Bumper & Front Skids.
#2 2008 Trx700xx AMR Reaper, Ehs Big 3, P/P head, Xcalibur Cam, Hard Welded Rockers, +1 In/Ex Valves, +3 Throttle body, 11:1 CP Piston, Elka Stage 3 Legacy Shocks, L8ton 11/16th Sway Bar, PRM Front Skids, Desert II Bumper & Rear Utility Rack.


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post #6 of 10 Old 12-31-2016, 07:15 PM Thread Starter
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Thanks man. So I need to stay away from just a re-ring job it sounds like. I made the decision to keep it today, ordered new tires, will just watch oil for awhile, but by spring hope to rebuild. Thanks for the heads up on the piston coming apart. Any info on the $450 top end kits with a new jug on ebay? I hate getting away from factory, but makes a day job out of it.
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post #7 of 10 Old 01-01-2017, 02:58 PM

 
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Originally Posted by IWL BCNU View Post
Thanks man. So I need to stay away from just a re-ring job it sounds like. I made the decision to keep it today, ordered new tires, will just watch oil for awhile, but by spring hope to rebuild. Thanks for the heads up on the piston coming apart. Any info on the $450 top end kits with a new jug on ebay? I hate getting away from factory, but makes a day job out of it.
If you pull piston and can inspect it, and it passes then maybe just rings & gasket kit. But I'd suspect you may find some cracks in the piston skirt. As far as the ebay kits go, find out what piston your getting. I herd the vertex piston are far from top quality. You can get a new OEM cylinder for $250.00 & OEM piston for $110.00 Then purchase a gasket kit for anywhere from $50 to $110 or so. Still cheaper than the cylinder work kits. But this way keeps you OEM not big bore.

Edit: I'm not sure if the oem pistons include the ring kit,

#1 2008 Honda Trx700xx HMF Performance Exhaust, PCV, Stroked 710cc, 10.5:1 Wiseco Piston, Frt Elka Stage 4's, Fox Podium X rear's, EHS Lid, L8ton 11/16" sway bar, DG 6 Pack Rack, PRM Desert II Bumper & Front Skids.
#2 2008 Trx700xx AMR Reaper, Ehs Big 3, P/P head, Xcalibur Cam, Hard Welded Rockers, +1 In/Ex Valves, +3 Throttle body, 11:1 CP Piston, Elka Stage 3 Legacy Shocks, L8ton 11/16th Sway Bar, PRM Front Skids, Desert II Bumper & Rear Utility Rack.


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Last edited by M_Quick; 01-01-2017 at 03:08 PM.
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post #8 of 10 Old 01-01-2017, 10:12 PM Thread Starter
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One other thing, I know I will check, but it usual to find valve problems too? Just trying to figure out a game plan. May plan on buying enough to make it a day job. I'm just a farm rider, so not trying make a racer. Would like to do a Wiesco piston and rings and a good hone.

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post #9 of 10 Old 01-02-2017, 11:31 AM

 
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Valves are probably still okay. When my engine blew it did bend a couple valves and atleast one cracked valve guide. So go easy on it, until you get it apart. Cause if it comes apart on its own your repair bill will be alot higher!

#1 2008 Honda Trx700xx HMF Performance Exhaust, PCV, Stroked 710cc, 10.5:1 Wiseco Piston, Frt Elka Stage 4's, Fox Podium X rear's, EHS Lid, L8ton 11/16" sway bar, DG 6 Pack Rack, PRM Desert II Bumper & Front Skids.
#2 2008 Trx700xx AMR Reaper, Ehs Big 3, P/P head, Xcalibur Cam, Hard Welded Rockers, +1 In/Ex Valves, +3 Throttle body, 11:1 CP Piston, Elka Stage 3 Legacy Shocks, L8ton 11/16th Sway Bar, PRM Front Skids, Desert II Bumper & Rear Utility Rack.


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post #10 of 10 Old 02-07-2017, 08:33 PM Thread Starter
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Well, I knocked it apart tonight, piston looked good, but the oil rings barely stuck out of the ring groove, while the compression rings were good. Everything else looked good.
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