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by alexanderfoti
Tue Sep 18, 2018 5:57 am
Forum: Classified Section
Topic: Kubota D662 Engine
Replies: 0
Views: 200

Kubota D662 Engine

Hi all

I have a D662 engine up for sale, bought to replace my 722 when I froze the coolant!

Anyway, never used, has 100 hours on it, refurbished by a tractor supplier in greece before I bought it.

https://www.ebay.co.uk/itm/173541585610

Would do it for £600 + shipping to a forum member.
by alexanderfoti
Mon Sep 17, 2018 5:25 pm
Forum: General Chat
Topic: Could this be the start if Sluggy II?
Replies: 46
Views: 6122

Re: Could this be the start if Sluggy II?

Just caught up on this, looks really good! Sorry for buying up all the Kubota stock :P (although I have never bought a 2 pot kubota, plenty of 3 cylinders though). Still plodding along on my D722 superdream, but I am wanting to turbo it, starting that long journey now. This build looks great, a turb...
by alexanderfoti
Mon Sep 17, 2018 4:41 pm
Forum: Exhaust, Turbo, Cooling & Induction Related Topics
Topic: Adding Turbo
Replies: 5
Views: 602

Re: Adding Turbo

Looks like it will go where the old water pump will be. any thoughts on which turbo is best? Ill probably look at a VZ21 which is a clone of the IHI RB31. http://fotifixes.com/imagehosting/images/2018/09/17/Capture.png It has a good flow rating for this engine (D722 approx 40CFM) and the ratio is go...
by alexanderfoti
Wed Jul 25, 2018 12:58 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

As long as the front pulley disengages or isn't trying to engage at idle it should be ok. There are quite a few Aixam belts but,as you say, they just list the part numbers with no dimensions. If you have a local bearing/industrial drive dealer they can usually help with belts and possibly give you ...
by alexanderfoti
Wed Jul 25, 2018 12:57 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

Well, the belt ran very hot so I switched back to the old belt. I ordered D3211AA1096 from an Italian belt supplier and it arrived (and is identical to the old one), but the shipping was nearly the same as the belt itself! Is there a cross reference for D3211AA1096 to an Aixam part number or is B 32...
by alexanderfoti
Sun Jul 22, 2018 5:28 pm
Forum: Electrical Related Topics
Topic: Glow plug relay wiring
Replies: 6
Views: 2115

Re: Glow plug relay wiring

I did not. I ended up using a generic 12v timer on ebay and a beefy relay.
by alexanderfoti
Fri Jul 20, 2018 3:57 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

I have fitted the thicker belt back.

I have compared the dimensions, its wider but the same OD, same ID and same Depth to the V.

So, I will run the thicker belt for a few miles and see how it behaves.
by alexanderfoti
Fri Jul 20, 2018 3:54 pm
Forum: ENGINE RELATED TOPICS
Topic: Kubota D950 questions
Replies: 1
Views: 454

Re: Kubota D950 questions

I run my d722 at 4000rpm and it seems quite happy.
by alexanderfoti
Fri Jul 20, 2018 2:41 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

The outside diameter is exactly the same as the old belt BTW.
by alexanderfoti
Fri Jul 20, 2018 2:41 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

Yes, it does say that BUT that would mean the new belt at 34mm is a bit too thick. The annoying thing is, i have replaced this belt in the past, this one has a 5000 miles or so in it, but I wore it out messing about with the CVT ratios and I cannot remember where I bought it from. I have lost contac...
by alexanderfoti
Fri Jul 20, 2018 12:45 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Re: Aixam Diesel belt thickness

Thanks both. I did try a belt from a 500.5 and its 34mm wide and very very diffilcult to get onto the pulleys. I did suceed, but the tension on the front made me wonder if it was too wide. It also sat proud of the rear pulley. The old belt measured at 30.5mm when worn, but slips on the rear pulley, ...
by alexanderfoti
Fri Apr 27, 2018 7:40 pm
Forum: General Chat
Topic: Diesel bike build in GB still viable?
Replies: 2
Views: 407

Re: Diesel bike build in GB still viable?

Yes I agree, that is the best way to do it.

I recently renewed insurance with footman james. Competitive and where happy with the engine mods.
by alexanderfoti
Thu Feb 15, 2018 2:44 pm
Forum: CVT Info
Topic: Aixam Diesel belt thickness
Replies: 11
Views: 1135

Aixam Diesel belt thickness

Hi all

All the Aixam CVT suppliers ask for vin numbers etc.

Can anybody tell me what their thickness of the cvt belt is? I suspect its 32mm, but I have been supplied both for various aixam 500 diesels....
by alexanderfoti
Sun Feb 11, 2018 6:34 pm
Forum: CVT Info
Topic: Limting CVT to achieve lower max ratio
Replies: 6
Views: 645

Re: Limting CVT to achieve lower max ratio

So I just discovered an additional 800rpm by fiddling with my goverener, so I re-geared for 81mph and I should be able to get there quicker. 2 issues. 1. The vibrations from the higher rpm running has broken my "epoxy repaired" thermostat housing, so now I need to remove the head to change the housi...
by alexanderfoti
Sat Feb 10, 2018 11:16 am
Forum: CVT Info
Topic: Limting CVT to achieve lower max ratio
Replies: 6
Views: 645

Re: Limting CVT to achieve lower max ratio

So am now geared to 75mph at top rpm. The obvious downside to this method of limiting RPM is that you loose the whole range of the CVT. If your speed drops too far down (below 66-67mph) then the rpms drop back down to around 2500 and you loose "power" again. This is mainly an issue on hills with hea...
by alexanderfoti
Fri Feb 09, 2018 6:32 pm
Forum: ENGINE RELATED TOPICS
Topic: Engine tuning for effiency
Replies: 4
Views: 677

Re: Engine tuning for effiency

Hi John, thanks for the input. Its a D722 3 pot, rated at 17hp ish. My fuel screw is tuned just right, with a light haze at full throttle. Like you, I am surprised at the low ish numbers. I used to get 120mpg on my 400 yanclone at full throttle everywhere. You are right on the gearing side, see my o...
by alexanderfoti
Sun Feb 04, 2018 11:56 pm
Forum: Clutch, Primary & Final Drive
Topic: Final Drive Solutions for CVTech - 6.9:1 Reduction Needed!!!
Replies: 9
Views: 1185

Re: Final Drive Solutions for CVTech - 6.9:1 Reduction Needed!!!

You are correct, I had measured rpm at the rear wheel of 1280rpm roughly. These measurements where before I installed the shims rather than after. Also I think my circumference is a bit bigger than 2000mm, as I measured the tyre, I think it was closer to 2125 from measurements. The gun was accurate,...
by alexanderfoti
Sun Feb 04, 2018 6:39 pm
Forum: General Chat
Topic: Electric assist - thoughts
Replies: 6
Views: 1014

Re: Electric assist - thoughts

boutje wrote:You could use the same the electric motor also as a generator to charge the battery.
I could! but the battery wouldn't charge at idle, or when the bike isnt moving.

Actually, I could get rid of the 12v battery altogether and run it from a 72-12v buck/boost converter.
by alexanderfoti
Sun Feb 04, 2018 12:03 pm
Forum: Clutch, Primary & Final Drive
Topic: Final Drive Solutions for CVTech - 6.9:1 Reduction Needed!!!
Replies: 9
Views: 1185

Re: Final Drive Solutions for CVTech - 6.9:1 Reduction Needed!!!

Hello, just got the PM. Yes, I had the same issues as you, and to compound things, any calculations I did to predict the rear wheel speed where wrong.I measured rear wheel RPM using an IR Tachometer. Not sure where it came about, but the Axiam CVtech CVT has limited ranges for tuning its operating c...
by alexanderfoti
Sat Feb 03, 2018 11:00 pm
Forum: General Chat
Topic: Electric assist - thoughts
Replies: 6
Views: 1014

Re: Electric assist - thoughts

Forgot to mention pricing!

Motor is about £300 with controller and all wiring required. Brackets etc will have to be made as required.

Batteries vary from £300-600 depending on capacity etc.
by alexanderfoti
Sat Feb 03, 2018 10:50 pm
Forum: General Chat
Topic: Electric assist - thoughts
Replies: 6
Views: 1014

Electric assist - thoughts

Hi all Am thinking about whether an hybridised electrification is a good idea? Take one of these motors: https://cdn.shopify.com/s/files/1/0919/6654/files/IMG_5113_large.JPG?8130786409064623538 A 3000watt planetary gear equipped motor. 100nm max torque! There is enough space on my secondary shaft th...
by alexanderfoti
Sun Jan 21, 2018 1:08 pm
Forum: ENGINE RELATED TOPICS
Topic: Oil temps
Replies: 2
Views: 448

Re: Oil temps

To follow up on this, I fitted one of these: https://i.ebayimg.com/images/g/HOYAAOSwKOJYGa6h/s-l1600.jpg and an oil "cooler" from a Fazer 600: https://i.ebayimg.com/images/g/iaQAAOSw-0xYS~n~/s-l1600.jpg Which is basically a flat plate heat exchanger. http://fotifixes.com/imagehosting/images/2018/01/...
by alexanderfoti
Fri Jan 19, 2018 9:10 pm
Forum: CVT Info
Topic: Limting CVT to achieve lower max ratio
Replies: 6
Views: 645

Re: Limting CVT to achieve lower max ratio

The pictures make it seem like that, but the reality is the pulleys are completely smooth.

The rear one has no visible marks on it, probably because its sheltered from the elements. Belt is all good.

Front idler bearing turns freely and is in good condition.
by alexanderfoti
Fri Jan 19, 2018 7:58 pm
Forum: CVT Info
Topic: Limting CVT to achieve lower max ratio
Replies: 6
Views: 645

Re: Limting CVT to achieve lower max ratio

There should be a thin bearing on the front pulley to prevent wear like this http://www.grays-aixam.co.uk/index.php?route=product/product&path=79_100_113&product_id=308 The belt sits on it at rest. This is the bearing number/size so possibly a slightly wider one would do the trick or shim it? 61806...
by alexanderfoti
Fri Jan 19, 2018 3:53 pm
Forum: CVT Info
Topic: Limting CVT to achieve lower max ratio
Replies: 6
Views: 645

Limting CVT to achieve lower max ratio

So my bike rides the cvt up to 3+ rpm until 20 mph where it drops to 2500 rpms and stays there. The front pulleys and rear pulleys are still going through their ratio. This means on the flat land (motorways) the bike is held at 2500 rpm at approximately 60mph. I struggle to get past this unless down...
by alexanderfoti
Wed Nov 29, 2017 2:44 pm
Forum: CVT Info
Topic: Broken CVT :(
Replies: 14
Views: 1016

Re: Broken CVT :(

Longer ride today with the new secondary and it does the acceleration slip thing much more than the old one. Took it off, removed 2 shims from the centre and moved the spring one click round on one end to increase the clamping force. Much better now, only slips/jumps if I am very aggressive with the...
by alexanderfoti
Tue Nov 28, 2017 3:09 pm
Forum: ENGINE RELATED TOPICS
Topic: Oil temps
Replies: 2
Views: 448

Oil temps

Do any of you monitor your oil temps? I installed an oil temp sender (sandwich plate between oil filter and block) and I do not see oil temps above 40-45 deg C (its currently 4 deg c) around town. My sump is stuck out in the air flow so doesn't surprise me that much, Should be able to net a few mpg ...
by alexanderfoti
Thu Nov 23, 2017 4:30 pm
Forum: ENGINE RELATED TOPICS
Topic: Injection Timing
Replies: 5
Views: 657

Re: Injection Timing

- Some interesting nuggets in this link specific to both of your questions regarding timing and turbocharging. While the subject line is in regard to the D950, much of the discussion is related to the 722. I would add that in a discussion with a chap who's rebuilt a good number of D902s, he noted t...
by alexanderfoti
Thu Nov 23, 2017 4:27 pm
Forum: ENGINE RELATED TOPICS
Topic: Injection Timing
Replies: 5
Views: 657

Re: Injection Timing

gilburton wrote: My advice would be to roll the throttle until you have engagement and rolling along and then open it again smoothly.
Thanks, this is what I end up doing, I'm sure that I'm hitting the torque limit of the cvt, as you say.
by alexanderfoti
Thu Nov 23, 2017 4:26 pm
Forum: CVT Info
Topic: Broken CVT :(
Replies: 14
Views: 1016

Re: Broken CVT :(

All back together with the new CVT and working well.

I took it all apart and cleaned it up before fitting.