300cc Kr1s Engine build

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Johnfarley
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300cc Kr1s Engine build

Post by Johnfarley » Sun Feb 24, 2019 7:49 pm

The start of a 300cc engine rebuild Image obviously in a sad state at the moment Image I will be loading more photos as and when Martin progress with the build cheers Martin 👍
Kr1s 300 special

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martin
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Re: 300cc Kr1s Engine build

Post by martin » Sun Feb 24, 2019 10:06 pm

I am looking forward to building this one John.

Zeeltronic will be dialled in and bespoke handmade pipes to suit the tune,

Am really hopeful with the final bhp figure, ( would be nice to top 70bhp)
Maybe wishful thinking but it would be nice
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fully restored green/white kr1 b2

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KR-1R
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Re: 300cc Kr1s Engine build

Post by KR-1R » Mon Feb 25, 2019 3:30 am

.
.
are those pistons on backwards?

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martin
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Re: 300cc Kr1s Engine build

Post by martin » Mon Feb 25, 2019 11:32 am

Looks like they are Danny.
Did not notice the holes on the piston facing the back when they should be to the front.
Doesn’t matter as it’s going to be stripped down and new pistons fitted
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fully restored green/white kr1 b2

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Johnfarley
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Re: 300cc Kr1s Engine build

Post by Johnfarley » Fri Mar 29, 2019 12:01 pm

Update on the 300 rebuild well the spare engine was not so good so decided to use the good one in the doner bike instead Image
Kr1s 300 special

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Re: 300cc Kr1s Engine build

Post by Johnfarley » Fri Mar 29, 2019 12:40 pm

And preparing for engine removal Image Image engine now out ready for stripping Image. Image and now the top end off Image I will be keeping this safe as a spare. Now Martin is adjusting top end gasget for the 300 top end Image one side sorted. Now the clutch total strip down and check then fitted with Charles Bullet clutch star. Image now putting back together Image
Kr1s 300 special

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Johnfarley
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Re: 300cc Kr1s Engine build

Post by Johnfarley » Thu Apr 04, 2019 11:32 am

Clutch now finished Image now Martin is checking the gear box and gears ⚙️ Image And in bits for checking and clean. Image. Image now done all to Martins high standards Image. Image now the cases of to Mike abbey to be flowed along with Stan Stephens 300cc top end to be fast road tuned as well Image. Image now the wait for mick abbey to do the tune etc then back to Martin no doubt Bernie will have the autosol out for a bit off polishing 😎
Kr1s 300 special

podman
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Re: 300cc Kr1s Engine build

Post by podman » Thu Apr 04, 2019 8:19 pm

Very nice indeed, ive seen Garys going at full chat and they do seem to go well...and sound proper 2T fit...

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martin
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Re: 300cc Kr1s Engine build

Post by martin » Sun Apr 07, 2019 7:26 pm

Thanks for your possative response podman.
I have been talking to John Farley a lot about this rebuild.
Am really hopeful on this build as this will be the very first Kr1s bike to have hand made
Bespoke pipes plus the veeltronic dialled in.

I am really hopeful of what we Will achieve from a 100% fully sorted 300cc krls..

It may only give the same power of Gary’s 68 bhp bike.
Or it may only give 67. Bhp as bernie Campbell’s bikes gives.

Fingers. Crossed
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fully restored green/white kr1 b2

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Re: 300cc Kr1s Engine build

Post by podman » Sun Apr 07, 2019 8:22 pm

Fab...

Is Mick Abbey the person who is going to build the pipes & set it up afterwards?

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martin
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Re: 300cc Kr1s Engine build

Post by martin » Sun Apr 07, 2019 9:40 pm

Yes he is.
Once I have built the engine and have got it running correct and synchronised the carbs,
It’s off to mick abbey to make the exhausts and set the carbaration up on the dyno.
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JanBros
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Re: 300cc Kr1s Engine build

Post by JanBros » Sun Apr 07, 2019 11:50 pm

martin wrote:
Sun Apr 07, 2019 7:26 pm
this will be the very first Kr1s bike to have hand made
Bespoke pipes
??
serious, you think no one has ever done that ? I have but they were crap so I kept it to myself :mrgreen:
My ultimate goal is to die young as late as possible !

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KR-1R
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Small end bearing

Post by KR-1R » Mon Apr 08, 2019 12:25 am

.
.
here is a link to partial cross reference gudgeon pin dimensions against some common JDM OEM numbers

http://www.tkrj.co.jp/product/m-se-bearing.html
.
.

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martin
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Re: 300cc Kr1s Engine build

Post by martin » Mon Apr 08, 2019 3:00 pm

What I meant about the pipes janbros was that the pipes are being made by mick abbey who is tuning the top end. And then setting it up on the dyno.
That’s why I said it will be the first time it would of been done,
I know you and fred have made pipes before, so may of got it a bit wrong.
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martin
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Re: 300cc Kr1s Engine build

Post by martin » Mon Apr 08, 2019 4:31 pm

Thanks for the link Danny.
I have found one bearing that may do it from the list you sent. Would be easier than fitting washers.
current bikes
fully restored green/white kr1 b2

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