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Author Topic: Lifan 150cc big-bore kit: Installation  (Read 35458 times)

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #160 on: Sep 23, 2017, 23:17:13 »
Any chance of them being reposted?

The photo service I was using is no more!

Will repost over next few days.

Crazy
“Ride like the Wind” W.H.

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #161 on: Sep 25, 2017, 22:22:15 »
Remove seat and petrol tank to allow clear access:



Remove carburettor and intake, spark plug, exhaust, horn and bracket:



Remove head steady bracket, the two bolts holding the front engine mounting bracket to downtube, top rear mounting bolt, and loosen bottom rear mounting bolt:



Remove tappet cover:



Remove rocker assembly; when lifting pushrods, make a note of which is intake and which exhaust:


« Last Edit: Sep 26, 2017, 06:03:11 by stroker crazy »
“Ride like the Wind” W.H.

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #162 on: Sep 25, 2017, 22:41:30 »
Remove the four head bolts, not forgetting the cam locating bolt on LHS of motor:



Lift head clear, keeping a look out for the dowels between head and cylinder:



Undo cylinder location screws on LHS of motor:



Lift cylinder, taking care to stuff crankcase openings as soon as possible



Pry out circlip from one end of gudgeon pin and push pin through the piston from the opposite side. (do not re-use circlips!)

“Ride like the Wind” W.H.

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #163 on: Sep 25, 2017, 22:53:28 »
Install new piston noting marked inlet side (lightly oil gudgeon pin to install),
make sure circlip gaps are to top or bottom rotate rings so that the gaps are 60 degrees apart:



Swap cam followers from original cylinder (be careful not to lose the wave washer) to the new cylinder:



Dowels in place in head:



Install 8mm/6mm exhaust studs:



Smear a very light coat of silcon sealant on cylinder mating surface, if you are not using a base gasket:

« Last Edit: Sep 26, 2017, 06:04:58 by stroker crazy »
“Ride like the Wind” W.H.

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #164 on: Sep 25, 2017, 23:12:08 »
After cleaning any gasket remains from crankcase and replacing dowels, lightly oil the cylinder and carefully slide into place over the piston (remove the stuffing when the rings are inside the cylinder):



Position head gasket and top dowels:



Bolt head in place (20–22lbf. or 28–30n/m) and replace cam locating bolt (13–16.5 lbf.). Be very careful when replacing the pushrods – angle them toward the outside corner and rock the cam using the kick-start lever to ensure contact. If not positioned correctly they will drop into the motor, necessitating the removal of the head and cylinder in order to retrieve them:



Replace rocker assembly:



Replace engine mounting bolts (8mm 22.5–27.5 n/m)

Adjust valve clearances – intake 0.1mm (0.004˝), exhaust 0.15mm (0.006˝). For correct TDC inlet valve should be closing as piston rises.

Replace tappet cover, refit head steady, carby, spark plug, horn, tank, etc.

Before starting, remove oil bleed screw from rocker cover. Start motor; when oil bleeds from from vent, replace screw.
“Ride like the Wind” W.H.

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #165 on: Sep 25, 2017, 23:25:32 »
That's as good as I remember!

Fortunately I had archived the photos. Any problems let me know.

Good luck!

Crazy
“Ride like the Wind” W.H.

Offline 2b

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Re: Lifan 150cc big-bore kit: Installation
« Reply #166 on: Sep 26, 2017, 06:37:35 »
And if like my kit, your rings are not fitted on arrival.....

Steps 1-3
1. Fit the corrugated type ring first, its actually an inverted T shape, so has to go in first to allow the two thin oil rings to fit in either side afterwards.

2. Fit the dark ring (D) facing up in the second groove.

3. Fit the silver ring (DY) facing up in the top groove.

READ MORE DETAIL IN THIS LINK>>>
http://www.duncanracing.com/TechCenter/4strk_ringinstall2-24-05.pdf

Clocking the rings vid

He's obsessed with order and clarity. He doesn't like mess.
Harold Pinter

Build thread: http://www.dotheton.com/forum/index.php?topic=61167.msg694438#msg694438

Offline stroker crazy

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Re: Lifan 150cc big-bore kit: Installation
« Reply #167 on: Sep 26, 2017, 07:06:27 »
And if like my kit, your rings are not fitted on arrival.....

A great addition!

Thanks 2b.

Crazy
“Ride like the Wind” W.H.

Offline Alex jb

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Re: Lifan 150cc big-bore kit: Installation
« Reply #168 on: Sep 26, 2017, 08:40:57 »
Top job!


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Online r4g5

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Re: Lifan 150cc big-bore kit: Installation
« Reply #169 on: Sep 29, 2017, 07:20:50 »
Thanks stoker and 2b for taking the time to upload these, this will be invaluable further down the line...top job

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