RollTide Posted January 23, 2021 Posted January 23, 2021 Hi Guys, does anyone know if you can use a gsx750 oil pump in a gsx 1100? Is the flow and pressure different, good or bad (1980 et)? Quote
Arttu Posted January 23, 2021 Posted January 23, 2021 According the parts fisches the pumps are the same for both. So I assume yes Quote
slayer61 Posted January 24, 2021 Posted January 24, 2021 It's my understanding that the drive gears are different between the two. Using 750 gears on the 11 will spin the pump faster, giving greater flow. +/- 30% I believe?? 3 Quote
Cedric Posted January 27, 2021 Posted January 27, 2021 On 1/24/2021 at 10:21 PM, slayer61 said: It's my understanding that the drive gears are different between the two. Using 750 gears on the 11 will spin the pump faster, giving greater flow. +/- 30% I believe?? That's also what I have heard. Quote
Reinhoud Posted January 31, 2021 Posted January 31, 2021 Don't pin me on this, but I think the MY has also to do wit it. For some years the 750 is wider than the 1100, difference between roller bearing and plain bearing. Quote
CockneyRick Posted February 9, 2021 Posted February 9, 2021 Done it on a GS1000, plan to do it on my EFE when i get to doing the engine. Got the parts so will eventually have a definitive answer. Quote
Sheep Posted February 9, 2021 Posted February 9, 2021 Done the swap on my EFE...no probs were encountered. Quote
johnr Posted February 22, 2021 Posted February 22, 2021 pump gears in a gsx1100 or gs1000 engine is a long known upgrade to the engines lubrication system. 1 Quote
M4N4 Posted March 21, 2021 Posted March 21, 2021 (edited) On 2/9/2021 at 9:04 AM, CockneyRick said: Done it on a GS1000, plan to do it on my EFE when i get to doing the engine. Got the parts so will eventually have a definitive answer. Edited March 21, 2021 by M4N4 Typed for a wrong person Quote
M4N4 Posted March 21, 2021 Posted March 21, 2021 On 2/9/2021 at 7:42 PM, Sheep said: Done the swap on my EFE...no probs were encountered. Specifically from what gsx 750 bike model is the oil pump gear from? Gsx 750 ES? Quote
CockneyRick Posted March 21, 2021 Posted March 21, 2021 30 minutes ago, M4N4 said: Specifically from what gsx 750 bike model is the oil pump gear from? Gsx 750 ES? Yes, what you should be looking at is the same number of total teeth. For instance: GS1000 Driven gear = 33T & Drive gear = 34T total = 67 teeth. GS750 driven gear = 29T & Drive gear = 38T total = 67 teeth. I believe even the GSX400 pump gears are the same as the GS750. As long as the fittings are the same, it just needs to add up to 67 Quote
CockneyRick Posted March 21, 2021 Posted March 21, 2021 And really you should be checking GS750, GSX750, GS400, GSX400 etc etc. Most people hunt down the GS750 Oil pump gears, but although i've not tried others i'm fairly confident these other bikes could well work too. There may be someone else out there who has actually tried others & prove me wrong, but as is, i'm willing to source others that are cheaper to find than the GS750 known "upgrade" option. Quote
Gixer1460 Posted March 21, 2021 Posted March 21, 2021 Its not the total number of teeth that is important ! Its the ratio that they give that matters - 34/33=1.03030 but 38/29=1.31034 so the latter turn the pump approx 25% faster - That's the important bit! 1 Quote
CockneyRick Posted March 21, 2021 Posted March 21, 2021 3 hours ago, Gixer1460 said: Its not the total number of teeth that is important ! Its the ratio that they give that matters - 34/33=1.03030 but 38/29=1.31034 so the latter turn the pump approx 25% faster - That's the important bit! Exactly but i was making the point of what fits & that the teeth quantity need to be exactly the same or they'll wreck shit Quote
Gixer1460 Posted March 21, 2021 Posted March 21, 2021 2 hours ago, CockneyRick said: Exactly but i was making the point of what fits & that the teeth quantity need to be exactly the same or they'll wreck shit But 50 + 17 = 67 but wouldn't likely fit or work! The number is inconsequential - if the gears were cut on a different pitch but same diameter, the teeth count would be different but ratio could be the same / better / worse. Its the same as final drive chains a 630 and a 530 sprocket could have the same diameter but tooth count would be wildly different giving a different overall ratio. Quote
CockneyRick Posted March 21, 2021 Posted March 21, 2021 I know exactly what you're saying, but again my point is about GS1000, GS750 & other similar year models. Being Suzuki as you well know, parts are very interchangeable. That is why we know certain OP gears will work. Quote
R1guy Posted January 27 Posted January 27 Just to bump this thread: I just picked up a set of 750 pump gears (38 and 29 tooth respectively ) for £50 from the ‘Bay. Online breaker had a motor he was splitting and accepted a cheeky offer. Point of this is- deals are still out there and you don’t need to spend out £250 for two gears. 4 Quote
R1guy Posted November 6 Posted November 6 Again - picked up another set of these for my other air cooled motor for £80 from DK on the ‘bay. Deals are still out there. Quote
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