Been lurking forums for a while and have received a ton of help already. Bought a used ltz400 that I've been trying to get running. Just looking for helpful hints so I know I'm in the right direction.
Bought non running but just came back from shop having new head (big bore 434cc), new piston and rings, cam chain done. I just can't get it running now.. Here is what I've already done....
Did coolant flush and oil change
Good spark and new plug (checked stator as well and checks out fyi)
Replaced oil pump gear and checked oil pump
Cleaned carb and installed dynojet jet kit (155 main etc) I double checked this also but I'm not sure it's giving fuel for some reason as spark plug never seems real wet)
Checked valves and fixed (they were quite out.. Now within spec) and double checked again after rotating and back at tdc.
Timing is bang on.. I double checked it also
New battery
Next and only thing I can now think of is if new rebuild has busted rings and no compression (or very low) and/or carb for some reason I can't see or tell isnt working.
I'm only well versed in repairing small honda motors so this is all new to me and a bit more advanced.
Is my next step to verify compression and if it's good, replace carb?
Check Compression to make sure nothing is off there, If that's good does it fire on ether? Try putting petcock on prime , check and make sure fuel is flowing . Check back in after these steps.
Would low compression cause it not to 'pull' fuel from carb? My old mikuni flat side carb used throttle to open slide but looks like these work on pressure to open slide?
If the quad is low on compression it will not fire, I am not sure how much the compression affects fuel being sucked from the carb but I am sure it does some.
Next question.... My cams are timed properly according to marks and tdc, But...... Lobes aare not at 10 and 2.how is that possible? Lobes look more like 12 and 2
Well.. You can see by pictures I have them lined up (2 and 3 at top) with correct spacing (15 pins on chain) at tdc and they are not sitting right. That'd explain why it won't run anyway.
So.... Sounds like need new cams then?
I'd also not be able to confirm compression or anything either until proper correct?
Order a set of stage 2 Hot Cams, Priced well and will give you a little bit of power nothing crazy though. I would hold off on compression test until things are correct with the cams.
So.. I'll order some new ones. If I get stage 2 Ames, I need drz springs? And I keep reading not to lap valves so how do I clean up seats with new valves?
Also, how can I tell if my guides are good or not? I've searched a fair bit on replacing valves but I can't seem to get good info on seat prep or how to check/change guides
Honestly i am not sure how to explain it, but its not a bad job, The DRZ springs should be used if getting a higher reving CDI Box, but I would recommend doing them while you have it a part either way, I think everyone is going to have their oppion on what brand to run, I honestly think you will be fine with Wiesco, Ferrea or KW. Is the piston ok? You could check ring end gap while you are in there and replace if needed, I would use DRZE gasket while its apart and probably replace teh Chain guides as well. I just did my sons and replaced everything.
I am going to have to let someone else see if they can guide/explain it to you. I am going to assume you will probably be fine , I did replace mine but I don't believe it was really needed. Make sure you do the timing chain and guides as well.
The only way to know for sure if your seats are good is the have them cut, or do a light lap, which is dubious with those valves. Or you could ignore it, and try gas in the chamber, see if leaks past the valves. You could buy 2 new wiseco valves and use those to lap the seats as well.
Quick clean on left exhaust valve and looks pretty good so will see how new valves sit.
I'll prob ask if local shop has an old one I can use to lap if it needs it. Can't see me buying a wiseco to toss out since it'd cost me like $60 cad before shipping even
I'll prob ask if local shop has an old one I can use to lap if it needs it. Can't see me buying a wiseco to toss out since it'd cost me like $60 cad before shipping even
I'm just going to see how they seal with new valves, springs etc I have coming. If they are terrible and leak a lot, I'll bring it to local bike shop and see if they can give me a hand. Nice thing about being small town area... Local small shops usually pretty good to assist for a case of beer
Been lurking forums for a while and have received a ton of help already. Bought a used ltz400 that I've been trying to get running. Just looking for helpful hints so I know I'm in the right direction.
Bought non running but just came back from shop having new head (big bore 434cc), new piston and rings, cam chain done. I just can't get it running now.. Here is what I've already done....
Did coolant flush and oil change
Good spark and new plug (checked stator as well and checks out fyi)
Replaced oil pump gear and checked oil pump
Cleaned carb and installed dynojet jet kit (155 main etc) I double checked this also but I'm not sure it's giving fuel for some reason as spark plug never seems real wet)
Checked valves and fixed (they were quite out.. Now within spec) and double checked again after rotating and back at tdc.
Timing is bang on.. I double checked it also
New battery
Next and only thing I can now think of is if new rebuild has busted rings and no compression (or very low) and/or carb for some reason I can't see or tell isnt working.
I'm only well versed in repairing small honda motors so this is all new to me and a bit more advanced.
Is my next step to verify compression and if it's good, replace carb?
Been lurking forums for a while and have received a ton of help already. Bought a used ltz400 that I've been trying to get running. Just looking for helpful hints so I know I'm in the right direction.
Bought non running but just came back from shop having new head (big bore 434cc), new piston and rings, cam chain done. I just can't get it running now.. Here is what I've already done....
Did coolant flush and oil change
Good spark and new plug (checked stator as well and checks out fyi)
Replaced oil pump gear and checked oil pump
Cleaned carb and installed dynojet jet kit (155 main etc) I double checked this also but I'm not sure it's giving fuel for some reason as spark plug never seems real wet)
Checked valves and fixed (they were quite out.. Now within spec) and double checked again after rotating and back at tdc.
Timing is bang on.. I double checked it also
New battery
Next and only thing I can now think of is if new rebuild has busted rings and no compression (or very low) and/or carb for some reason I can't see or tell isnt working.
I'm only well versed in repairing small honda motors so this is all new to me and a bit more advanced.
Is my next step to verify compression and if it's good, replace carb?
10 to 1 its the timing. . Maybe they didn't put it back togather the correct way after bbk. I have stage 1 hotcams and athena 440 I put In mine. Just got the fcr mx carb from keihin and man it is bad a$$ . Carb will factor over it all
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