Think I've already heat seized new engine??

ITZRIL3Y said:
Also I've definitely already mentioned at beginning but would feel silly not to bring it up again after I built this bike I was running 25:1 as I already had a tank with gas on bike for this build after I cleared through all the petrol I filled up again but wanting to be careful with break in period I used 40:1 which is where my problems with hesitation and bogging came from after this I added 500ml of straight gas into the tank bringing the mix up to 25:1 and it started again but again this is where the trouble starts probably did a 5 mile trip on first ride with 20:1 and everything was brilliant
After too much oil there's been problems ever since.
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All my bike run at a constant 25:1. It's one of my power secrets lol. They hate 40:1. But more oil=lean mix(higher viscosity=harder suck in) less oil=rich mix(lower viscosity=easier to suck in). Reallhope that helps
 
Mike Cyanide said:
They hate 40:1. But more oil=lean mix(higher viscosity=harder suck in) less oil=rich mix(lower viscosity=easier to suck in). Reallhope that helps
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Lean and rich has everything to do with fuel mix aspiration inside the carburetor and where you have the needle valve set...Thats where we use the terms lean and rich Mike.

His entire problem is confusion over oil/fuel ratio's where he thinks a 40:1 is more oil than a 20:1 ratio...It is the absolute opposite of what he is thinking and doing...Did you miss what I posted on this subject when he described in detail what he was doing and how he may have already ruined his motor???

Read it a bit slower and more carefully this time.

motoredbikes.com

Think I've already heat seized new engine??

I don't have any of that sadly, my carb is extremely snug on the pipe and wouldn't even twist left or right without loosineing of screw only place I could think of is gausket for fuel bowl is definitely on its way out if not completely gone But like usual with these things it's Gunna be sat in...
motoredbikes.com motoredbikes.com
 
DAMIEN1307 said:
Lean and rich has everything to do with fuel mix aspiration inside the carburetor and where you have the needle valve set...Thats where we use the terms lean and rich Mike.

His entire problem is confusion over oil/fuel ratio's where he thinks a 40:1 is more oil than a 20:1 ratio...It is the absolute opposite of what he is thinking and doing...Did you miss what I posted on this subject when he described in detail what he was doing and how he may have already ruined his motor???

Read it a bit slower and more carefully this time.

motoredbikes.com

Think I've already heat seized new engine??

I don't have any of that sadly, my carb is extremely snug on the pipe and wouldn't even twist left or right without loosineing of screw only place I could think of is gausket for fuel bowl is definitely on its way out if not completely gone But like usual with these things it's Gunna be sat in...
motoredbikes.com motoredbikes.com
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Agreed and also with Mike. Who knows exactly what ratio he is running but by what he said hes doing it the other way around.

To OP since youre using the proper measuring system Ill make it easy for you:

Get a 5L gas can. Add 200mL of 2 stroke oil then fill to the full 5L tge rest with gas/petrol. That will get you right around the right ratio for break in.

After break in, 175mL instead of 200.

Shake the gas can around a bix to ensure the oil and gas are mixing. Put gas into bike from 5L can.
 
I like to use metric to measure gas to oil. Super easy to do in milliliters. 25:1 = 25/ 1000 ml= 40 ml oil per 1 liter gas.

This is what Weefek has suggested 200 ml / 5000 ml gas = 25:1

Just doesn't get any easier.
 
Update I have bought a brand new carb mixed a proper 20:1 ratio and now the bike will not even run before the carb it would start and ride and shortly die but now doesn't want to start at all
 
Now runs completely well with new carb and a 20:1 ratio just breaking in atm intake on the carb blew off somewhere down the road so going to put another one on to replace
 
Still noticing that each time I try to reach the same speed my engine bogs down and loads of smoke comes out of the head and exhaust really feels like a soft seize but it doesn't turn off goes back to normal as soon as you give off the accelerator
 
ITZRIL3Y said:
Still noticing that each time I try to reach the same speed my engine bogs down and loads of smoke comes out of the head and exhaust really feels like a soft seize but it doesn't turn off goes back to normal as soon as you give off the accelerator
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Have you remembered that whilst breaking it in, you have to re-torque the head bolts after every ride???

If you check it out, you will probably find that they are loose...You wouldn't have any smoke eminating from the head unless they were not torqued down properly.

Make sure that anytime you retorque the head, the motor must be completely cold or you will strip out those soft aluminum threads in the bottom end that those studs go into.

Torque to no more than 12 foot pounds which is also 144 inch pounds.

Do that first and then report back if that was the problem.
 
I did know this none of the bolts have needed relighting fortunately as I do have a torqe wrench available the carb definitely has no air leaks on the manifold but once again my bastard idle screw came out so guessing that's Gunna be the issue I have another one arriving soon
 

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