XR200 tips wanted

**nzspokes** · 6th October 2011, 20:31

Ok, tops off. had to drill out one of the allen bolts.

Bore looks great as does the piston. Im make it with tired eyes 65mm piston with 60mm stroke. There looks to have been machining done under where the barrell sits in the crankcase. Rings are real good. reading the spec says its not much bigger than stock. top of piston says 0.050. Hmmmmm

Did find a bit of crap in the mechanical advance.

**husaberg** · 6th October 2011, 20:42

Originally Posted by nzspokes

Ok, tops off. had to drill out one of the allen bolts.

Bore looks great as does the piston. Im make it with tired eyes 65mm piston with 60mm stroke. There looks to have been machining done under where the barrell sits in the crankcase. Rings are real good. reading the spec says its not much bigger than stock. top of piston says 0.050. Hmmmmm

Did find a bit of crap in the mechanical advance.

STD Honda dimensions are 65.5mm bore X 57.8mm Stroke
Some ATC200 3 wheelers were 65mm I think but with dished pistons.
The std Honda XR200 piston is flat topped.
So my guess is either a .5mm os piston at 66mm.or a .5mm os piston from a ATC200 in dished.Assuming it is a Honda piston I guess. Can you post some pics?

My guess its the stroke will be std as it would not be worth the trouble to stroke a crank 1mm.ESP when you can slip in a Chinese one.

**actungbaby** · 6th October 2011, 20:51

Originally Posted by nzspokes

Pic time. Seat and tank are just sitting on.

cool buddy looks awsome i remember when these came out like orginal tool bag on the back i brought 1990 version just got framed painted yours looks mint
the frame paint good there fun engine all seem to be in the right gear

**nzspokes** · 6th October 2011, 20:53

My measurements will be off. Im tired and cant find my verniers. But will be close. piston is domed. Wonder if the old owner was told this is a 203 kit not 230.

**actungbaby** · 6th October 2011, 21:02

just dont do what i did drop it of the work bench onto the concrete floor
but hole in the sump , well another one that wasint factory designed
i wraped a tensile wire around the fly wheel and then used car jack on
the crankcase and pulled it of like that
u according to the manuall use the rear wheel axle and use it to tread inside the
fly wheel but didnt work for me as wasint the right thread

Originally Posted by husaberg

Bite the bullet and borrow steel or buy or build a spanner for the clutch Hub and Oil centrifugal filter Please.......You can make one out of a old socket or a piece of pipe.

Before you sling it back together please check the kick starter is both engaging fully and more importantly disengaging as I believe this could be (I hope its not as then you will have to split the cases sorry) the source of your banging rather than the your now ex misses.
which i personally always found to be more of a moaner rather than a screamer

sorry.

BTW best check out the cam chain before you run the old dog as it seems to have been put together somewhat lacking in love I would also whip off the top of the head so make sure the cam tunnel in the head is not chewed up and there is not silastic everywhere to block up the oil-way also check the restrictor bung is in place as it looks like a bit a dick would throw out.

**husaberg** · 6th October 2011, 21:19

Originally Posted by actungbaby

just dont do what i did drop it of the work bench onto the concrete floor
but hole in the sump , well another one that wasint factory designed
i wraped a tensile wire around the fly wheel and then used car jack on
the crankcase and pulled it of like that
u according to the manuall use the rear wheel axle and use it to tread inside the
fly wheel but didnt work for me as wasint the right thread

I mentioned the Axel earlier cant remember which Honda it is for.
My guess is now don't take this the wrong way
But do you wear Gumboots to work.
It is just a guess I gut the feeling you are either work in Agriculture, Aquaculture or Siviculture am I close.
my guess is Dairy Industry?

There is another way when you are caught without a puller it is.

But it is so much easier and cheaper in the long run to use the correct factory puller.

**nzspokes** · 6th October 2011, 21:26

I will take the motor with me to the bike mechanic and see if he can quickly take the flinger and flywheel off.

Its not a 230 kit I would say but 203.

**husaberg** · 6th October 2011, 21:26

Originally Posted by nzspokes

My measurements will be off. Im tired and cant find my verniers. But will be close. piston is domed. Wonder if the old owner was told this is a 203 kit not 230.

Engines grow when they are for sale.

A coulple of pics from the side would be nice and underside of the piston.
From the top it looks like a Wiseco 12:1 If it is a Score, Thats A 200 dollar Piston.
PS the case look like that STD.But someone has loved the motor in the past at least.
.5mm os only = 197.7cc on a std stroke.

**nzspokes** · 6th October 2011, 21:34

Originally Posted by husaberg

Engines grow when they are for sale.

A coulple of pics from the side would be nice and underside of the piston.
From the top it looks like a Wiseco 12:1 If it is Score, Thats A 200 dollar Piston.
PS the case look like that STD.
.5mm os only = 197.7cc on a std stroke.

Will do more photos tomorrow. With a bit of luck the case will be split.

It doesnt look/feel like a cheap piston. It has a brand mark on the bottom. I will post up pic.

**nzspokes** · 6th October 2011, 21:38

Originally Posted by husaberg

Engines grow when they are for sale.

A coulple of pics from the side would be nice and underside of the piston.
From the top it looks like a Wiseco 12:1 If it is a Score, Thats A 200 dollar Piston.
PS the case look like that STD.But someone has loved the motor in the past at least.
.5mm os only = 197.7cc on a std stroke.

On closer inspection, there is a W in an oval circle.

**husaberg** · 6th October 2011, 21:41

Originally Posted by nzspokes

Will do more photos tomorrow. With a bit of luck the case will be split.

It doesnt look/feel like a cheap piston. It has a brand mark on the bottom. I will post up pic.

I hope it is a W

I have never done the starter mod myself But I have seen a write up on it it said all the part numbers and all.Good luck.

And acording to above you are in luck.

Measure the stroke with a cheap vernier for a ball park stoke length.

**nzspokes** · 6th October 2011, 21:44

Originally Posted by husaberg

I hope it is a W

I have never done the starter mod myself But I have seen a write up on it it said all the part numbers and all.Good luck.

And acording to above you are in luck.

Its confirmed, the part number matches the Wiseco website as the .50 10 to 1 piston.

What is the starter mod?

**husaberg** · 6th October 2011, 22:28

Originally Posted by nzspokes

Its confirmed, the part number matches the Wiseco website as the .50 10 to 1 piston.

What is the starter mod?

This is it here I think

http://www.thumpertalk.com/forum/arc.../t-891213.html

PS 10:1 is even better as you can stroke it without the comp going to high if you want I would Have thought it would be higher than 10;1 as they were meant to be that std.