|
|
| Author |
Message |
| joshbaty116 |
This post is not being displayed .
|
joshbaty116
L Plate Warrior
Joined: 27 Jun 2011
Karma :  
|
|
| Back to top |
  |
You must be logged in to rate posts |
|
 |
| hazza |
This post is not being displayed .
|
hazza
World Chat Champion
Joined: 28 Sep 2005
Karma :  
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| joshbaty116 |
This post is not being displayed .
|
joshbaty116
L Plate Warrior
Joined: 27 Jun 2011
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| joshbaty116 |
This post is not being displayed .
|
joshbaty116
L Plate Warrior
Joined: 27 Jun 2011
Karma :
|
|
| Back to top |
| |
You must be logged in to rate posts |
|
|
| unitynotsocri... |
This post is not being displayed because the poster is banned. Unhide this post / all posts.
|
unitynotsocri...
Banned
Joined: 29 Jun 2011
Karma : 
|
 Posted: 17:45 - 30 Jun 2011  Post subject: |
 |
|
make sure there's no air in the autolube pipes and that the oil pump is primed.If it uses points under the flywheel then setting the gap is trickier as you need to check the timing with a bulb/multimeter after each gap adjustment.If you get it running to start with then immediatly check the timing with a strobe,incorrect timing on 2 strokes seems a lot more dangerous and can hole pistons and smash rings easier.
____________________
nearly a normal tax paying tosser.......with ferrileness suzi100,cg125,cb125scb100n,cb175,cd100,cj250t,kh250,c15,125 bantam,super 6,rickman gs750,xt500,250rs,dt175,lifan125,dolomite1850,metro,Morris220ld,morrisfg,leyland princess,range rover,corsa,vw camper .now struggling with legs. MORE ORDER = MORE CHAOS |
|
| Back to top |
 |
You must be logged in to rate posts |
|
|
| Teflon-Mike |
This post is not being displayed .
|
Teflon-Mike
tl;dr
Joined: 01 Jun 2010
Karma : 
|
| Posted: 19:20 - 30 Jun 2011 Post subject: Re: Update |
|
|
| joshbaty116 wrote: | after keep trying and trying n tinkering ive looked at pissed n its blown it apart yet again n smashed the rings to pieces any ideas y it keeps doing this .. |
Numerouse reasons:
1/ Piston / cylinder clerance too big
- bore excessively worn
- rebored barel with standard size piston & rings, rather than oversized rings and or piston.
2/ Piston rings not 'pegged'
- peg not fitted
- peg shaken loose
3/ Your cracking rings
- under sized rings being fitted to over sized piston
- clumsily fitting them to piston
- not seating them correctly in grooves
- not aligning properly with peg
- snagging them fitting barel over piston
4/ Piston ring grooves are 'gummed' so rings cant seat properly
5/ Piston rings are 'snagging' on ports in cylinder wall.
- over sized piston rings
- poorly seated rings
- unpegged rings
- ports badly 'adapted' in some attempt at tuning, widened with needle file or dremmel, or the actual window chamfered around teh edge, and or burrs left.
6/ engine nipping up
- oversize piston / rings in undersized barel
- lack of oil
- weak fuel air mixture causing over heating (Often caused by running premix in petrol, without up jetting, hence same volume of 'fuel' flowed from tank per rev but less of it petrol, some of its oil!)
- 'Pre-Lube' not used during rebuild.... engine started 'dry' (piston & rings should be soaked in two stroke oil before assembly so as to provide 'pre-lube' when first turned over.
7/ Over revving engine, before rings bedded in, or engine warmed up
8/ Cheap nasty piston and or rings
9/ trying to re-use old rings
10/ ANY combination of above factors!
____________________
My Webby'Tef's-tQ, loads of stuff about my bikes, my Land-Rovers, and the stuff I do with them!
Current Bikes:'Honda VF1000F' ;'CB750F2N' ;'CB125TD ( 6 3 of em!)'; 'Montesa Cota 248'. Learner FAQ's:= 'U want to Ride a Motorbike! Where Do U start?' |
|
| Back to top |
 |
You must be logged in to rate posts |
|
 |
Old Thread Alert!
The last post was made 14 years, 267 days ago. Instead of replying here, would creating a new thread be more useful? |
 |
|
|
Help & FAQs
Search BCF
Members
Groups
Events Calendar
rating
rating